Frequencies for first 10,000 rows of prov1510 variable in pos1997 dataset :

    medical |
     social |
  workers - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,960       99.60       99.60
        .05 |          1        0.01       99.61
        .25 |         15        0.15       99.76
         .5 |          4        0.04       99.80
          1 |         16        0.16       99.96
          2 |          2        0.02       99.98
          3 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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