What is the average life expectancy for people with Cystic Fibrosis?

I'm pregnant with my first baby and I got some tests done and the doctors informed me that my daughter will have Cystic Fibrosis. My mother had a brother and sister who died from the disease when they were quite young. Anyway, I'm wondering what is the current life expectancy for children/people with Cystic Fibrosis and how can you best take care of them to maximize their life?