Frequencies for first 10,000 rows of cause23d variable in nhamcsopd1997 dataset :

   cause of |
injury #2 - |
      broad |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,902       99.02       99.02
        848 |          2        0.02       99.04
        849 |         82        0.82       99.86
        878 |          1        0.01       99.87
        883 |          1        0.01       99.88
        888 |          5        0.05       99.93
        917 |          2        0.02       99.95
        919 |          1        0.01       99.96
        924 |          1        0.01       99.97
        928 |          1        0.01       99.98
        960 |          1        0.01       99.99
        985 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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