Frequencies for first 10,000 rows of prov1505 variable in pos1998 dataset :

 registered |
   nurses - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,943       99.43       99.43
        .01 |          2        0.02       99.45
        .13 |          2        0.02       99.47
        .25 |         10        0.10       99.57
         .5 |          1        0.01       99.58
        .75 |          1        0.01       99.59
          1 |         20        0.20       99.79
       1.25 |          1        0.01       99.80
        1.5 |          1        0.01       99.81
          2 |         13        0.13       99.94
          3 |          1        0.01       99.95
          8 |          2        0.02       99.97
         10 |          1        0.01       99.98
         13 |          1        0.01       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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