Frequencies for first 10,000 rows of papconv variable in nhamcsopd2010 dataset :

      pap - |
conventiona |
          l |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,860       98.60       98.60
        yes |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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