In 2010, working-age adults made an average of 3.9 visits to doctors, nurses or other medical providers, down from 4.8 visits in 2001, according to a report released Monday by the U.S. Census Bureau. Among those with at least one such visit, the average number of visits also declined, from 6.4 to 5.4 over the period. “The decline in the use of medical services was widespread, taking place regardless of health status,” a bureau official said. People under 65 whose health was poor, fair or good were more likely to be uninsured (23 percent, 25 percent and 24 percent, respectively) than those with very good or excellent health (20 percent and 16 percent, respectively).