Frequencies for first 10,000 rows of prov1480 variable in pos1991 dataset :

 counselors |
- volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,915       99.15       99.15
        .11 |          1        0.01       99.16
        .25 |         32        0.32       99.48
         .5 |          9        0.09       99.57
        .75 |          5        0.05       99.62
          1 |         19        0.19       99.81
        1.5 |          1        0.01       99.82
          2 |          3        0.03       99.85
          3 |          2        0.02       99.87
          4 |          4        0.04       99.91
          5 |          3        0.03       99.94
          6 |          1        0.01       99.95
          8 |          1        0.01       99.96
         14 |          1        0.01       99.97
         18 |          1        0.01       99.98
         20 |          1        0.01       99.99
         75 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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