Frequencies for first 10,000 rows of cause23d variable in nhamcsopd2002 dataset :

   cause of |
injury #2 - |
      broad |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,939       99.39       99.39
        700 |         34        0.34       99.73
        710 |         13        0.13       99.86
        878 |          2        0.02       99.88
        886 |          1        0.01       99.89
        888 |          3        0.03       99.92
        917 |          2        0.02       99.94
        920 |          1        0.01       99.95
        928 |          1        0.01       99.96
        929 |          3        0.03       99.99
        939 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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