Babysitter pay???? What to pay?!

Sadly, my 8 months of free care for my daughter is ending. My mother in law is too sick to care for my daughter, and tomorrow my neighbors daughter (recent high school graduate) will be watching my daughter approximately 3 days a week. I had talked to co workers and they told me how much they pay their sitter. Just wanna hear more numbers, so I can kinda gauge where I want to pay her. I live in a rural area in Pennsylvania, and I know cost of living is way down here compared to let's say.. San Francisco. I googled babysitter pay and 16$ an hour came up, and that was babysitting in SF. What do you pay?