Frequencies for first 10,000 rows of cause23d variable in nhamcsopd1995 dataset :

   cause of |
injury #2 - |
      broad |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,983       99.83       99.83
        819 |          2        0.02       99.85
        878 |          3        0.03       99.88
        888 |          1        0.01       99.89
        906 |          1        0.01       99.90
        914 |          1        0.01       99.91
        917 |          3        0.03       99.94
        920 |          1        0.01       99.95
        922 |          1        0.01       99.96
        927 |          3        0.03       99.99
        960 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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