Frequencies for first 10,000 rows of rn_vlntr_cnt variable in pos2000 dataset :

 registered |
   nurses - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,954       99.54       99.54
        .01 |          2        0.02       99.56
        .13 |          1        0.01       99.57
        .25 |          3        0.03       99.60
         .5 |          1        0.01       99.61
        .75 |          1        0.01       99.62
          1 |         17        0.17       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
          4 |          1        0.01       99.96
          6 |          1        0.01       99.97
          8 |          2        0.02       99.99
         13 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017