Frequencies for first 10,000 rows of rniflag_8 variable in linkco1991us_num dataset :

  Nature of |
Injury Flag |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         18        0.18        0.18
          1 |          2        0.02        0.20
          . |      9,980       99.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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