...rose from
4.3% in 1999 to 6.9% in 2009 and 2010, and then fell to 5.4%
in January–September 2014, according to a government report.
Source:
"Early Release of Selected Estimates Based on Data From the National
Health Interview Survey, January–September 2014," National Center for
Health Statistics/Centers for Disease Control and Prevention, March 2015, http://www.cdc.gov/nchs/data/nhis/earlyrelease/earlyrelease201503_03.pdf
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