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

      Fatal |
  Injury at |
       Work |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,299       32.99       32.99
          1 |        129        1.29       34.28
          8 |      5,972       59.72       94.00
          9 |        600        6.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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