Frequencies for first 10,000 rows of cause2 variable in nhamcsopd1998 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,929       99.29       99.29
       848- |          1        0.01       99.30
       8490 |         13        0.13       99.43
       8493 |         20        0.20       99.63
       8494 |          5        0.05       99.68
       8495 |          1        0.01       99.69
       8496 |          6        0.06       99.75
       8497 |          2        0.02       99.77
       8498 |          4        0.04       99.81
       8769 |          1        0.01       99.82
       8781 |          1        0.01       99.83
       8844 |          1        0.01       99.84
       8845 |          1        0.01       99.85
       885- |          2        0.02       99.87
       888- |          4        0.04       99.91
       9068 |          1        0.01       99.92
       9179 |          1        0.01       99.93
       9198 |          1        0.01       99.94
       927- |          1        0.01       99.95
       9288 |          1        0.01       99.96
       9290 |          1        0.01       99.97
       9291 |          1        0.01       99.98
       9479 |          1        0.01       99.99
       9688 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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