Frequencies for first 10,000 rows of cause2 variable in nhamcsed1994 dataset :

   cause of |
  injury #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
      80000 |      7,090       70.90       70.90
      80019 |      2,798       27.98       98.88
      88490 |         39        0.39       99.27
      88494 |          3        0.03       99.30
      88495 |          3        0.03       99.33
      88496 |          9        0.09       99.42
      88497 |          4        0.04       99.46
      88498 |         39        0.39       99.85
      88504 |          2        0.02       99.87
      88588 |          1        0.01       99.88
      88589 |          1        0.01       99.89
      88609 |          2        0.02       99.91
      88659 |          1        0.01       99.92
      88880 |          1        0.01       99.93
      89064 |          1        0.01       99.94
      89208 |          2        0.02       99.96
      89310 |          1        0.01       99.97
      89500 |          1        0.01       99.98
      89504 |          1        0.01       99.99
      89601 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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