Frequencies for first 10,000 rows of cause23d variable in nhamcsopd1996 dataset :

   cause of |
injury #2 - |
      broad |      Freq.     Percent        Cum.
------------+-----------------------------------
        000 |      9,933       99.33       99.33
        815 |          1        0.01       99.34
        849 |         43        0.43       99.77
        878 |          1        0.01       99.78
        879 |          1        0.01       99.79
        885 |          3        0.03       99.82
        887 |          1        0.01       99.83
        888 |          4        0.04       99.87
        899 |          1        0.01       99.88
        906 |          2        0.02       99.90
        917 |          2        0.02       99.92
        918 |          1        0.01       99.93
        925 |          1        0.01       99.94
        935 |          1        0.01       99.95
        949 |          2        0.02       99.97
        960 |          2        0.02       99.99
        968 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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