How many years does it take for a female great white shark to reach sexual maturity?

I answered 15 which should be the correct answer because they taught us for years that it was around 15 . even you said that

Wow 33 yrs is a long time to wait to procreate in nature speak, we need to look after the oceans & all life forms that live in them. Over fishing & shark predation is changing the balance, I once heard from a marine biologist that sharks good for the natural balance of seas they are the cleaners of the sea.