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How many transgender people are there in the UK?The UK produces official statistics about all sorts of things – from economic indicators to demographic data. But it turns out there are no official figures for the number of transgender people in the UK. We explore what we do know, and what is harder to measure.Do 4% of the population drink nearly a third of the alcohol?According to recent headlines, just 4% of the population drink nearly a third of the alcohol sold in England. But can so few people really account for so much of the countries bar tab? We find out where the statistic came from. Bank of England’s Mark Carney says no to RPIAt a hearing of the House of Lords’ economic affairs committee, the Governor of the Bank of England, Mark Carney, said it would be useful to have a single measure of inflation for consumers – and that CPI was a much better measure than RPI, which he said had “no merit”. We find out why with the FT’s Chris Giles.A statistical take on parkrunEvery weekend over 1.5 million people run 5,000m on Saturday mornings for parkrun which is a free event that takes place all over the UK and indeed across the globe. Each runner is given a bar code, which is scanned at the end of the run and fed into a database showing them what place they came in their race– we take a look at which courses are the fastest, slowest, hardest and easiest. Testing for a cough correlation between snooker and smokingA listener emailed us this week to ask whether you can connect the number of coughs during snooker matches to the decline in smoking. We got counting to see if the theory was a trick shot - with help from John Virgo. Photo: Jimmy White Credit: Photo by Jamie McDonald/Getty Images

The survey question that could affect the accuracy of its results.The United States are due to run their next nationwide census in 2020, but already critics are warning that underfunding and proposed question about citizenship could affect the accuracy of its results. We look at the real life consequences if groups choose not to complete the 2020 census, and ask whether the recent politically charged debate is unusual in its two hundred year history. Presenter: Tim Harford Producer: Kate LamblePhoto: Concerned woman holding a clipboard and a pen Credit: Nicolas McComber/Getty Images

First sexual experience - checking the facts A short film for the Draw A Line campaign has made the claim that one in three girls first sexual experience is rape. This seems shockingly high, but what is the evidence? Is it just for the UK or a global figure? We go back to the reports that were used to source the claim, and find the research has been misinterpreted.How long can a shark go for without eating? A recent episode of Blue Planet II stated that after a large meal a Sixgill shark might not have to eat for 'up to an entire year'. Tim Harford speaks to Dr David Ebert, a shark expert who has studied the stomach contents of Sixgills over the years. And to Professor Alex Roger, a zoologist who advised the Blue Planet team, to try and find out how accurate the claim is and why the deep sea is still a mystery. The wonder of Prime Numbers Oxford mathematician Vicky Neale talks about her new book - Closing The Gap - and how mathematicians have striven to understand the patterns behind prime numbers. Multiple grannies A Swiss mummy has recently been identified as a distant ancestor of Boris Johnson. But some people have been getting tangled up over just how many great-great-great-great-great-great-great grandmothers the Foreign Secretary might have. We tackle an email from one listener - none other than the broadcaster Stephen Fry.

If you ask an economist to explain what is happening in a country’s economy. They rely on economic data points to describe what is happening – they might talk about the unemployment rate, average wages, and the numbers of people in poverty. They pull together the information available for thousands or millions of people to work out trends.But are we getting the whole picture?We speak to Rachel Schneider, co-author of the book, ‘The Financial Diaries’. It’s based on a large study in the USA. Over a period of a year from 2012 to 2013, researchers interviewed several families about how they were managing their money to find out the personal stories behind economic data.Presenter and Producer: Charlotte McDonald(Photo: A couple looking at their finances. Credit: Wayhome Studio/Shutterstock)

Gender Pay Gap This week the Office for National Statistics has published analysis trying to find out why it is that on average women are paid less than men in specific industries and occupations. We examine their findings, as well as taking a look at the current discussion about equal pay at the BBC.Alcohol reaction times We take a look at a study that suggests that people's reaction speeds are affected over time by regular drinking. It recommends that official guidelines for the amount of alcohol consumed a week should be lowered. But what does the evidence show?Bus announcements - when is too many? Transport for London has introduced a new announcement on its buses to warn travellers that the bus is about to move. We discuss the benefit of such messages. How many words do you need to speak a language? Ein bier bitte? Loyal listener David made a new year's resolution to learn German. Three years later, that's about as far as he's got. Keen to have something to aim for, he asked More or Less how many words you really need to know in order to speak a language. We find out with help from Professor Stuart Webb, and put Tim through his paces to find out how big his own English vocabulary is.Producer: Charlotte McDonald.(Photo: Man and woman working on a car production plant. Credit: SEBASTIEN BOZON/AFP/Getty Images)

A forgotten French mathematician is the focus of our programme. He anticipated both Einstein's theories and the application of maths to the stock market. Born in the 1870s, his work was unusual at the time. With the help of Alison Etheridge, Professor of Mathematics at the University of Oxford, we explain how his ideas were rediscovered decades after his death.(Photo: Pocket watch. Credit: Kanyapak Lim/Shutterstock)

Did missed appointments cost the NHS £1 billion last year? New figures published recently suggest that the financial cost to the NHS for missed appointments was £1 billion last year. But our listeners are curious. How has this figure been worked out? And don’t missed appointments actually ease the pressure on an overcrowded system?Graduate pay – is it always higher than non-graduates’ pay? It is often claimed that if you go to university and get a degree, you will earn more than those who do not. But is that always true? We take a look to see if there are occasions when having a degree makes little difference or whether the benefit of a degree has changed over time.How much cocaine is on a bank note? Tim Harford speaks to Richard Sleeman who works for a firm, Mass Spec Analytical, that specialises in working out how much cocaine can be found on bank notes across the country. Do some parts of the country have more cocaine on their notes than others? Is it true that 99% of bank notes in London have cocaine on them?Is it true that one in five can’t name an author of literature? Last year the Royal Society of Literature made this claim – but what was it based on? It turns out a polling company found that 20 percent questioned failed to name a single author. Should we be surprised? We took a look at the data.Diet Coke Habit The New York Times claims that Donald Trump drinks ‘a dozen’ Diet Cokes a day. With each can of 330ml containing 42mg of caffeine - what impact, if any, could this have on the President’s health?

Exploring the improbable feat of achieving a hole-in-one in golf, with statistics revealing only 10 to 15 occurring yearly out of 15,000 rounds played. Delving into the unique instances and expert analysis on the likelihood of achieving a hole-in-one. Revealing how knowledge of probabilities can lead to success in gambling on golf tournaments.

Discover the top highlighted terms of the year, explore the chosen statistics including global phone connections, learn about technology advancements in Africa and India, analyze risk and statistical perception in America, and explore the surprisingly low densely built-up area in the UK.

Exploring the energy used to secure cryptocurrency, dissecting Bitcoin mining and its electricity consumption, comparing it to traditional systems and addressing sustainability concerns amid rapid growth.