Frequencies for first 10,000 rows of papconv variable in nhamcsopd2008 dataset :

      pap - |
conventiona |
          l |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,933       99.33       99.33
        yes |         67        0.67      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016