Vex Robotics Info

Hello, How many people are there total in Vex? from all different levels? I’m not sure where to find this, does anyone have a number? Even an approximation?

On this website,http://www.roboticseducation.org/vex-robotics-competitionvrc/, it says:" The VEX Robotics Competition, presented by the Robotics Education & Competition Foundation, is the largest and fastest growing middle and high school robotics program globally with more than 10,000 teams from 32 countries playing in over 750 tournaments worldwide." I believe this was written during the beginning of this season.