Frequencies for first 10,000 rows of injury variable in natl1995 dataset :

     Injury |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         10        0.10        0.10
          2 |      9,935       99.35       99.45
          8 |          1        0.01       99.46
          9 |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Dec 2015