MLB scouts at high school games

Just wondering…Does anyone know about how many high school Senior pitchers are scouted by MLB scouts each year?

Thousands of HS senior pitchers are scouted each year. Of course not every kid who’s scouted is drafted. Seven HS pitchers went in the first round last year. A little over 250 HS pitchers went in the first 30 rounds. Here’s the 2016 MLB Draft tracker that you can sort by HS or College pitchers to see the numbers:!ft=position&fv=posp