Frequencies for first 10,000 rows of rn_vlntr_cnt variable in pos2003 dataset :

 registered |
   nurses - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,949       99.49       99.49
        .01 |          2        0.02       99.51
        .13 |          1        0.01       99.52
        .25 |          5        0.05       99.57
         .5 |          1        0.01       99.58
        .75 |          1        0.01       99.59
          1 |         16        0.16       99.75
       1.25 |          3        0.03       99.78
        1.5 |          1        0.01       99.79
          2 |         13        0.13       99.92
          3 |          2        0.02       99.94
          4 |          2        0.02       99.96
          6 |          1        0.01       99.97
         13 |          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 , 17 May 2017