Frequencies for first 10,000 rows of prov2870 variable in pos1995 dataset :

transplanta |
       tion |
certificati |
         on |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,945       99.45       99.45
          A |         40        0.40       99.85
          B |          6        0.06       99.91
          C |          1        0.01       99.92
          D |          1        0.01       99.93
          E |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016