Unprotected sex while pulling out on fertile days safe?

We aren't trying to prevent it I'm not on Birth Control and we rarely use condoms. I've used the withdrawal method/pull out method for over 2 years and have never been pregnant! I'm 15% today and just wondering is there really even a chance of me ever getting pregnant this way? He doesn't ejaculate before we have sex and I'm just going on how I haven't gotten pregnant yet. Just looking for advice on this topic :)

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