Frequencies for first 10,000 rows of sigcolon variable in namcs2014 dataset :

      Sigmoidoscopy/colonoscopy recoded |
                               variable |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                                     No |      9,834       98.34       98.34
Yes (from procedure write-ins and check |        166        1.66      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017