New Census data out Wednesday showed the uninsured rate ticking downward, from 16.3 percent in 2010 to 15.7 percent in 2011. That downward trend, however, looks to be concentrated in a handful of states.

The State Health Access and Data Assistance Center maps out the change in insurance rates, between 2011 and 2012. Only seven states saw a statistically significant decline in the uninsured rate. Two, New Hampshire and Colorado, actually saw their uninsured rates go up.

Mississippi saw the largest drop in its uninsured rate falling by 4.9 percent, from 21.1 percent in 2010 to 16.2 percent in 2012. Colorado, meanwhile, saw its rate tick up by 2.7 percent.

It's hard to draw a pattern between these seven states.They don't share uniform politics, geography or demographics. A SHADAC analyst cautions about reading too much into these numbers; they do, after all, only represent change over the course of a single year. Even looking back at two-year averages (available here), they show a similar pattern: Not all changes in insured rates get distributed equally across the country.