Top percentage of 100 swimmers who become top 100 at 17-18 age group

From a discussion on Facebook in March, 2018:

Mark Hesse

Did some investigation into the requests - while it is "possible" for us to produce a percentage of swimmers who are registered USA Swimming members at age 10 and are also registered at age 18 who are not currently tracking that data. It probably requires some software changes to execute that query. So it may may be information that will be more readily available in the future. My educated guess from looking at the type of data we are tracking (primarily how many swimmers have been continuously registered for X number of years) is that the number is somewhere between 20-33% of 10 year olds are still registered at 18. There are also many swimmers who do not register with USA Swimming that are still competing for HS and College teams. We also do not track an all-time top 100 for any age groups beyond 17-18.

Mark Hesse

The industry accepted statistic is that 70% of kids quit organized yout hsports by age 13.