A recent study by Health Affairs showed that from 2006 to 2009, the proportion of people under 65 who spent more than 10 percent of their income on health stayed steady because of less spending on prescription drugs. "Despite decreased family income and rising unemployment caused by the recession of 2007-2009, the percentage of people under age 65 with high medical cost burdens remained largely unchanged between 2006 and 2009, at approximately 19 percent. That unexpected result, based on data from the Medical Expenditure Panel Surveys, contrasts with an increase from 14.4 percent to 19.2 percent in the share of people with high medical cost burdens between 2001 and 2006." Peter Cunningham, the author of the study, attributes the decline to an increase in the use of generic drugs.