Frequencies for first 10,000 rows of prov2315 variable in pos1991 dataset :

 srv: organ |
 transplant |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,770       87.70       87.70
          0 |      1,118       11.18       98.88
          1 |         38        0.38       99.26
          2 |         68        0.68       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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