Frequencies for first 10,000 rows of cause2 variable in namcs2000 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,978       99.78       99.78
       8582 |          1        0.01       99.79
       8600 |          1        0.01       99.80
       8788 |          2        0.02       99.82
       8801 |          1        0.01       99.83
       885- |          3        0.03       99.86
       888- |          2        0.02       99.88
       915- |          1        0.01       99.89
       9170 |          1        0.01       99.90
       9179 |          2        0.02       99.92
       9192 |          1        0.01       99.93
       9208 |          1        0.01       99.94
       9290 |          1        0.01       99.95
       9359 |          1        0.01       99.96
       9673 |          3        0.03       99.99
       9675 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016