Frequencies for first 10,000 rows of cause2 variable in nhamcsed1995 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
       0000 |      9,923       99.23       99.23
       8147 |          1        0.01       99.24
       8199 |          1        0.01       99.25
       8600 |          1        0.01       99.26
       8613 |          1        0.01       99.27
       8621 |          1        0.01       99.28
       8668 |          1        0.01       99.29
       888- |          4        0.04       99.33
       9010 |          1        0.01       99.34
       9019 |          1        0.01       99.35
       914- |          3        0.03       99.38
       9170 |          2        0.02       99.40
       9179 |         38        0.38       99.78
       9203 |          1        0.01       99.79
       9208 |          3        0.03       99.82
       9209 |          2        0.02       99.84
       927- |          4        0.04       99.88
       9288 |          2        0.02       99.90
       9397 |          1        0.01       99.91
       9479 |          1        0.01       99.92
       9503 |          1        0.01       99.93
       9505 |          1        0.01       99.94
       966- |          1        0.01       99.95
       9671 |          1        0.01       99.96
       9688 |          3        0.03       99.99
       9689 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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