According to a recent government report for January through September 2014,

survey respondents assessed their own health as follows:

• 36.5% - excellent
•  30.1% - very good
• 23.6% - good
• 7.6% - fair
• 2.2$ - poor

The percentage of persons who reported "excellent" or "very good" health decreased with age:

• 84.7% of those under age 18
• 64.7% of those aged 18–64
• 45.2% of those aged 65 and over

Source: "Early Release of Selected Estimates Based on Data From the National Health Interview Survey, January–September 2014," Centers for Disease Prevention and Control/National Center for Health Statistics, March 24, 2015, http://www.cdc.gov/nchs/data/nhis/earlyrelease/earlyrelease201503_11.pdf