From a quick google search, it looks the pill is 99.7%

Posted on: May 17, 2019 at 13:30:05 CT

effective and condoms are 98% effective. My math may be wrong but I think that means you have a 0.006% chance of getting pregnant even if you are using both. The average adult has sex 54 times a year and there 229 million people over 18 in the US. So my quick math tells me that is 12.4 billion bone sessions a year in the US. So if everyone used condoms and birth control, that means there could still be 745,000 potential pregnancies even with the use of BC and condoms.


Sources:

http://time.com/4692326/how-much-sex-is-healthy-in-a-relationship/

https://www.plannedparenthood.org/learn/teens/ask-experts/im-on-the-pill-i-had-sex-with-a-condom-and-it-broke-what-are-the-chances-i-could-be-pregnant

https://www.plannedparenthood.org/learn/birth-control/condom/how-effective-are-condoms

https://datacenter.kidscount.org/data/tables/99-total-population-by-child-and-adult#detailed/1/any/false/871,870,573,869,36,868,867,133,38,35/39,40,41/416,417