How much is a normal amount of vaginal secretions?

Generally my panties become wet enough to leave a wet spot on a chair (when wearing a miniskirt) a couple hours after wearing them. My secretions do not smell foul or fishy, and from what I have researched it seems to be of healthy consistency and odor. However, it's the AMOUNT that weirds me out. It seems like a lot. Other girls can sit with their legs apart with no scent, and while mine doesn't smell BAD (just a slight "vaginal" scent, not gross. still, it's not something I want to advertise.) I've had this problem for about four or five years now and I'm beginning to wonder if it's normal...