the united states
1912
Women's cross-country Mountain Biking was on August 11 2012
Tennis
Women's Boxing
there wasn't a 50 meter freestyle event in the 1964 Olympics. Only 100 meters.
An exhibition match was played at the 1904 Olympics, but basketball did not become an official part of the games until 1936.AnswerAugust 1936
2500
Hoge Lumber Company
P. Jaroenrattanatarakoon (Thailand) won the gold medal in the women's 53 kg weightlifting event in the 2008 Summer Olympics.
The gold medal in the Women's Uneven Bars event at the Rio 2016 Olympics was awarded to Aliya Mustafina.
The Olympics has more country's but the gymnaestrada is the biggest participant event in the world with double the amount of participants.
The country that won the gold medal in the Women's Keirin event at the Rio 2016 Olympics was the Netherlands.