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

   FATAL AT |
       WORK |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,169       31.69       31.69
          1 |        123        1.23       32.92
          8 |      6,049       60.49       93.41
          9 |        659        6.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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