From 1996 to 2006,the rate of outpatient colonoscopy procedures increased for adults aged >=50 years. For persons aged 50--64 years, the rate in 2006 was 3.5 times higher than the rate in 1996 (472.4 versus 132.2 procedures per 10000 population), or for those aged 65--74 years,the rate was nearly three times higher (638.5 versus 216.2). For persons aged 75--84 years, the rate in 2006 was more than twice the rate in 1996 (517.3 versus 230.5), and for persons aged ¡Ý85 years,the increase was approximately double (173.6 versus 96.9).
Source: cdc.gov