When I went to Aruba with my friend, a sailor there told us that most sailors eventually got melanoma from being out allthe time. That's what made me realize this.
That 5% figure is much less interesting when you realize they mean _inherited_ genetic defects.
> most sailors eventually got melanoma from being out allthe time
These two statements seem in conflict to me.
It's lke saying "Craps is a random. If you roll the dice at Vegas all the time, eventually you will lose your bankroll."
Smokers have significantly higher chance to get cancer then non-smokers, but they are not guaranteed to have it. Both smokers and non-smokers can get lung cancer and it is biased random whether you will get it or not.
You could smoke cigarette's and never get lung cancer. You could spend your whole life in the sun and never get skin cancer.
However, you can increase the chances of happening through things like excessive sun exposure.