Frequencies for first 10,000 rows of cause2 variable in nhamcsopd1999 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,986       99.86       99.86
       8199 |          1        0.01       99.87
       885- |          3        0.03       99.90
       9069 |          1        0.01       99.91
       9262 |          1        0.01       99.92
       927- |          1        0.01       99.93
       9288 |          1        0.01       99.94
       9356 |          1        0.01       99.95
       9479 |          1        0.01       99.96
       9600 |          1        0.01       99.97
       9673 |          1        0.01       99.98
       9674 |          1        0.01       99.99
       9679 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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