Frequencies for first 10,000 rows of prov1505 variable in pos2006 dataset :

 registered |
   nurses - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,953       99.53       99.53
        .01 |          1        0.01       99.54
        .13 |          1        0.01       99.55
        .15 |          1        0.01       99.56
        .25 |          3        0.03       99.59
         .5 |          2        0.02       99.61
        .75 |          1        0.01       99.62
          1 |         18        0.18       99.80
       1.25 |          3        0.03       99.83
        1.5 |          1        0.01       99.84
          2 |         10        0.10       99.94
          3 |          2        0.02       99.96
          4 |          2        0.02       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