Frequencies for first 10,000 rows of mdcl_scl_workr_vlntr_cnt variable in pos1996 dataset :

    medical |
     social |
  workers - |
  volunteer |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,961       99.61       99.61
        .05 |          1        0.01       99.62
        .25 |         14        0.14       99.76
         .5 |          4        0.04       99.80
          1 |         16        0.16       99.96
          2 |          3        0.03       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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