Nationally, the last time it was reported, the average increase in insurance costs was around 2x.
Obamacare also does not provide coverage for anyone that is near, or makes less, than the poverty line. It simply mandated by pen, rather than by a way, that the states absorb those people on their medicaid program (though the fed does assume the majority of the cost at least till 2022).
So there are quite a few excuses for not having insurance, such as its now more expensive for a lot of people, especially the ones that can't afford it.