Frequencies for pm_harm variable in parkwork dataset :

       most |
    harmful |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          3        0.27        0.27
          2 |         16        1.47        1.74
          5 |          1        0.09        1.83
          7 |          2        0.18        2.02
          8 |         13        1.19        3.21
          9 |          2        0.18        3.39
         12 |        799       73.24       76.63
         14 |        214       19.62       96.24
         16 |          8        0.73       96.98
         18 |          3        0.27       97.25
         30 |          2        0.18       97.43
         45 |         10        0.92       98.35
         54 |         18        1.65      100.00
------------+-----------------------------------
      Total |      1,091      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016