The Republican efforts to get rid of the Affordable Care Act received a boost just before Election Day with the release of statistics showing that typical midlevel premiums for those who purchase insurance through the federal health care exchange will rise by 25 percent in 2017. In some states, the jumps will be far larger; 116 percent in Arizona, for example. But lost in the uproar was the fact that only about 3 percent of Americans buy unsubsidized insurance — and the remarkable accomplishment that more than 20 million people have received insurance through Obamacare while the proportion of uninsured Americans has dropped to less than 9 percent, the lowest on record.