Again, charting is completely unreliable. So, no, that didn't help your chances at all. Condom and birth control failure rates are still there, too. You didn't get rid of them by adding more failure rates on top. Birth control is only handed out to non-smoking women under 30 who fit a certain weight and blood pressure criteria. Most aren't aware of what medications or herbal supplements will render their birth control useless.Not to mention not all women have the type of schedule that does well with consistency, which is what birth control requires. Birth control also increases the possibility of vaginal dryness. Which leads to lube. Which leads to the possibility of "not knowing" and getting one that breaks the condom down.
It's nice to say, oh, you can do this, and that, and this. Women HAVE tried this, and that, and this. Accidents still happen, regardless. And not all women believe in Plan B or early abortion. You can decrease your chances(some), you can't be perfect. And it starts with the doctors office. They need to GIVE information, not just a, "Oh, here's a pill pack". They don't tell you, "Don't take with antibiotics", they don't say, "Oh, be sure to check expiration dates". THAT is the biggest reason why birth control fails. Uneducated women who wouldn't know better regardless.
(Oh, and side note, all that gets worse with Romney in office, as he doesn't believe in sex education, just abstinence only. Yay for more uneducated people have uneducated sex!).