Frequencies for first 10,000 rows of cause33d variable in nhamcsed2002 dataset :

   cause of |
injury #3 - |
      broad |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,980       99.80       99.80
        700 |          8        0.08       99.88
        710 |          3        0.03       99.91
        854 |          1        0.01       99.92
        881 |          1        0.01       99.93
        898 |          1        0.01       99.94
        917 |          1        0.01       99.95
        950 |          3        0.03       99.98
        963 |          1        0.01       99.99
        968 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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