If this is more suited elsewhere, then please move

I was speaking to my friend about pregnancy (she knows a girl that is due soon) and she mentioned that her mother had a planned c-section and that if she ever got pregnant that she would also have a planned c-section because of the "not so nice" things that can happen during natural birth.
I was just wondering how many women would choose (or have chosen) to have a c-section and how many would (or have chosen) choose the natural birth? And why?