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

      Fatal |
  Injury at |
       work |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,264       22.64       22.64
          1 |         67        0.67       23.31
          8 |      5,740       57.40       80.71
          9 |      1,929       19.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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