Looks like ~1% of US high school students had stats in 1990 and only ~11% in 2009. https://nces.ed.gov/fastfacts/display.asp?id=97 https://nces.ed.gov/fastfacts

Looks like ~1% of US high school students had stats in 1990 and only ~11% in 2009. https://nces.ed.gov/fastfacts/display.asp?id=97 https://nces.ed.gov/fastfacts/display.asp?id=97