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

   FATAL AT |
       WORK |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,447       34.47       34.47
          1 |        124        1.24       35.71
          8 |      5,980       59.80       95.51
          9 |        449        4.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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