Frequencies for first 10,000 rows of work_inj variable in person dataset :

      fatal |
  injury at |
       work |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,174       41.74       41.74
          1 |         99        0.99       42.73
          8 |      5,707       57.07       99.80
          9 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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