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

   FATAL AT |
       WORK |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,623       36.23       36.23
          1 |        137        1.37       37.60
          8 |      5,857       58.57       96.17
          9 |        383        3.83      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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