Frequencies for first 10,000 rows of cause2 variable in namcs2001 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,969       99.69       99.69
       710- |          1        0.01       99.70
       8199 |          1        0.01       99.71
       8614 |          1        0.01       99.72
       8664 |          1        0.01       99.73
       8781 |          1        0.01       99.74
       8784 |          1        0.01       99.75
       8788 |          1        0.01       99.76
       8798 |          1        0.01       99.77
       8844 |          1        0.01       99.78
       8849 |          1        0.01       99.79
       8859 |          3        0.03       99.82
       888- |          3        0.03       99.85
       9179 |          2        0.02       99.87
       9209 |          1        0.01       99.88
       9269 |          1        0.01       99.89
       927- |          1        0.01       99.90
       9293 |          1        0.01       99.91
       9298 |          2        0.02       99.93
       9304 |          1        0.01       99.94
       9600 |          1        0.01       99.95
       9679 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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