Frequencies for first 10,000 rows of injury variable in natl1989 dataset :

     Injury |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          9        0.09        0.09
          2 |      9,800       98.00       98.09
          8 |          1        0.01       98.10
          9 |        190        1.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016