Numbers of the year: Part one

Tim Harford asks a group of numbers-minded people to take a look back on the year and think of one statistic that really stands out for them. From the spread of Covid-19 to the number of songs added to Spotify this year, we showcase figures that tell us something about 2020. We speak to Oliver Johnson, professor of information theory at the University of Bristol in the UK; Anne-Marie Imafidon, creator and CEO of social enterprise Stemettes; and economist Joel Waldfogel, of the University of Minnesota.