Chances?!

We're currently NTNP, I would love another but hubby is more on the fence and said if it happens he'll be happy but doesn't want to actively try.

Been using pullout method for years and haven't had a slip up but I keep hoping it'll happen one day.

Ovulation day yesterday according to my app and had sex, but I'd like to know the statistics on how common pregnancy is from using pull out during fertile days. Everything I've read is contradicting itself between various google searches!