Frequencies for first 10,000 rows of prov1505 variable in pos2004 dataset :

 registered |
   nurses - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,954       99.54       99.54
        .01 |          1        0.01       99.55
        .13 |          1        0.01       99.56
        .15 |          1        0.01       99.57
        .25 |          3        0.03       99.60
         .5 |          1        0.01       99.61
        .75 |          1        0.01       99.62
          1 |         16        0.16       99.78
       1.25 |          3        0.03       99.81
        1.5 |          1        0.01       99.82
          2 |         11        0.11       99.93
          3 |          2        0.02       99.95
          4 |          2        0.02       99.97
          6 |          1        0.01       99.98
         15 |          1        0.01       99.99
         20 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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