It's an excellent question.
There is absolutely a disproportionate drop-off that occurs as girls enter their teenage years. Approximately one in every two girls tends to drop out of sport between the age of 12 and the time they would graduate from high school, in comparison to one in every three boys in that same time period. That's the latest data we have from Canadian Women & Sport.
They have articulated several reasons for that, in their own voice, as to why they would drop off, but it comes down to not having spaces and places that are welcoming for their particular social, emotional and physical needs. Quite frankly, there is a dearth of programming that still exists across the country that is designed specifically to create those safe spaces for girls and young women.