Frequencies for first 10,000 rows of rniflag_6 variable in linkco1991us_num dataset :

  Nature of |
Injury Flag |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        179        1.79        1.79
          1 |         20        0.20        1.99
          . |      9,801       98.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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