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

      fatal |
  injury at |
       work |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,057       40.57       40.57
          1 |         96        0.96       41.53
          8 |      5,707       57.07       98.60
          9 |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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