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

   FATAL AT |
       WORK |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,280       32.80       32.80
          1 |        107        1.07       33.87
          8 |      5,994       59.94       93.81
          9 |        619        6.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016