U.S. spending on health insurance grew at an accelerated rate in 2011, breaking a two-year trend of smaller cost increases. Spending for private health insurance surged by 4.6 percent in 2011, according to a report from the Health Care Cost Institute. That growth rate is faster than the rest of the economy and higher than the previous year, which had 3.8 percent growth. Average spending on a private insurance patient rose to $4,547 in 2011, compared with $4,349 in 2010. That statistic suggests that a recent downturn in health-care spending may have been a temporary product of the recession rather than a more permanent change, as some health-care economists have hoped.