Earlier quoted context omitted.
Condoms effectivement is 98%: https://www.nhs.uk/conditions/contraception/male-condoms/ If you have sex twice a week (which for a young couple is very conservative), after a year, you've reach 100 attempts already. You then better hope the two patners agree on wether or not keeping the baby.
It's 98% for the condom itself, but if you couple it with the fact that the 2% failure rate has to correspond with an ejaculation in an ovulating female's vagina, the actual effectiveness is much higher.
>When used correctly every time you have sex, male condoms are 98% effective. This means 2 out of 100 people will become pregnant in 1 year when male condoms are used as contraception.
On the other hand, over 20 years, that translates to an efficacy rate of only 67%.