[1] http://www.census.gov/prod/cen2010/briefs/c2010br-03.pdf (roughly 4M 26-year-olds in the US; 0.01% is 400 people)
[2] http://www.theatlantic.com/business/archive/2014/10/the-top-... (for 27-31, 1% = $135k, 0.1% = $300k)
[3] https://dqydj.com/income-percentile-by-age-calculator/ ($200k is within the top 1% for 26-year-olds)