Frequencies for first 10,000 rows of rn_vlntr_cnt variable in pos1992 dataset :

 registered |
   nurses - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,960       99.60       99.60
         .2 |          1        0.01       99.61
        .25 |         10        0.10       99.71
         .5 |          2        0.02       99.73
        .75 |          2        0.02       99.75
          1 |          9        0.09       99.84
          2 |          8        0.08       99.92
          3 |          4        0.04       99.96
          4 |          2        0.02       99.98
          8 |          1        0.01       99.99
         15 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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