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

      fatal |
  injury at |
       work |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,095       40.95       40.95
          1 |         81        0.81       41.76
          8 |      5,727       57.27       99.03
          9 |         97        0.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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