It might just be my area of the country, but the pill seems to be the standard contraception recommended and given, or was to me as a teenager anyway.
The pill is (I think?) 98% effective if taken correctly, so not accounting for one off forgetfulness, stomach bugs so on, after a year there's a 2% chance of pregnancy, so after 5 years that's a 10% chance.
I got pregnant at 19 after taking it on time, and I seem to know more women who have had unplanned babies or abortions from being on the pill than women who have not having fallen pregnant on it.
I'm now on the implant, which seems close to 100% effective from reading up on it, and other than it costing more I don't understand why doctors don't give more information on it and recommend it over the pill, especially for teenagers who might not even know about it and just go for the pill as standard because it's more commonly known about.