Frequencies for pm_harm variable in parkwork dataset :

       most |
    harmful |
      event |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.18        0.18
          2 |          3        0.26        0.44
          8 |         14        1.24        1.68
         12 |      1,019       89.94       91.62
         14 |         60        5.30       96.91
         18 |          7        0.62       97.53
         19 |          2        0.18       97.71
         24 |          3        0.26       97.97
         30 |          2        0.18       98.15
         38 |          1        0.09       98.23
         39 |          1        0.09       98.32
         42 |          2        0.18       98.50
         43 |          2        0.18       98.68
         45 |          3        0.26       98.94
         73 |          8        0.71       99.65
         99 |          4        0.35      100.00
------------+-----------------------------------
      Total |      1,133      100.00

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