Frequencies for first 10,000 rows of cause2 variable in nhamcsopd1995 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,983       99.83       99.83
       8199 |          2        0.02       99.85
       8781 |          1        0.01       99.86
       8784 |          1        0.01       99.87
       8789 |          1        0.01       99.88
       888- |          1        0.01       99.89
       9060 |          1        0.01       99.90
       914- |          1        0.01       99.91
       9179 |          3        0.03       99.94
       9209 |          1        0.01       99.95
       9229 |          1        0.01       99.96
       927- |          3        0.03       99.99
       9600 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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