I just got mine to flip ..watch a youtube video on spinning babies they give you some great moves to try that are super easy! My Dr told me yesterday that not until you get to 36 weeks do they seem concerned about it unless they think you could go early!
i dont kmow what the % is of the baby flipping but i know its possible even past 36 weeks. i know being inverted can help so spend some quality time in positions from yoga like downward dog or child's pose (alittle more relaxing) if you have regulated or certified acupuncturist where you live i would look for one who specializes in prenatal and fertility acupuncture they have points they use to flip baby with about 70% success rate. and i didn't personally hear this from my midwife but a friend had a breech baby and her midwife suggested doing handstands in the pool. lol i guess anything is worth a try.
I'm 31 weeks and mine is also breech. They say there's nothing to worry about until 34-36 weeks because they will flip a thousand times between now and then.