Frequencies for first 10,000 rows of prov1505 variable in pos2001 dataset :

 registered |
   nurses - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,948       99.48       99.48
        .01 |          2        0.02       99.50
        .13 |          1        0.01       99.51
        .25 |          4        0.04       99.55
         .5 |          1        0.01       99.56
        .75 |          1        0.01       99.57
          1 |         19        0.19       99.76
       1.25 |          3        0.03       99.79
        1.5 |          1        0.01       99.80
          2 |         12        0.12       99.92
          3 |          2        0.02       99.94
          4 |          1        0.01       99.95
          6 |          1        0.01       99.96
          8 |          2        0.02       99.98
         13 |          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