August 18th, 2016
Reporting by Aparna Alluri, Piyush Aggarwal, Harry Stevens, Gurman Bhatia and Anand Katakam. Lead illustration by Anand Katakam.
Notes: Visualized above are the national 100m records for the 197 countries whose records were ratified by the International Association of Athletics Federations. We have used average speed to calculate the position of every runner.
Data source: International Association of Athletics Federations and various regional athletic organisations.