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

      fatal |
  injury at |
       work |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,148       41.48       41.48
          1 |         77        0.77       42.25
          8 |      5,681       56.81       99.06
          9 |         94        0.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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