Frequencies for first 10,000 rows of rniflag_5 variable in linkco1991us_num dataset :

  Nature of |
Injury Flag |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        580        5.80        5.80
          1 |         43        0.43        6.23
          . |      9,377       93.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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