Frequencies for first 10,000 rows of cause3 variable in nhamcsed2007 dataset :

   cause of |
  injury #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
         -9 |      9,951       99.51       99.51
       700- |          4        0.04       99.55
       710- |         27        0.27       99.82
       8199 |          1        0.01       99.83
       8490 |          4        0.04       99.87
       8494 |          1        0.01       99.88
       8495 |          4        0.04       99.92
       8497 |          3        0.03       99.95
       8499 |          1        0.01       99.96
       8500 |          1        0.01       99.97
       9354 |          1        0.01       99.98
       9460 |          1        0.01       99.99
       956- |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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