Gracenote Sports creates a Virtual Medal Table for the Olympic Games based on data from events with world fields from London 2012 up to Rio 2016.
"Initially, it looked as though it would be close for second place, with China just taking it, but the surprise gold medals from Nick Skelton and the women's hockey team made Great Britain the most likely country to finish second.
They had been absent since 1952 - when only one athlete represented the nation - following a dispute with the International Olympic Committee over the status of Taiwan.
Prior to that, the nation had not won any medals.
On 116 medals after day 15, the US has now achieved 100-plus medals five times since Atlanta 1996, with an average of 101.6.