70 weeks of required rotations!? Do you go to a school with an extremely abbreviated pre-clinical curriculum? That's the only remotely sane possibility I can see here, if you essentially have 3 years of clinical. Even still, only 19 weeks (that's what, 4.5 month-long blocks?) of elective time is pretty sucky. And you're probably being shortchanged on step 1 study time.
Our entire 4th year is elective time, up to 9 4-wk blocks. One month has to be something inpatient and one month has to be something (mostly) outpatient. Beyond that they don't care. 3rd year is pretty much as IAmBobTrustMe laid out.
The only saving caveat would be if your 12-months of surgery was actually 1 month of a general surgery experience with the rest of it being elective surgery stuff (ENT, optho, Anesthesia, SICU, etc.). Same thing with medicine and OB and peds.