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

   is visit |
 related to |
  injury or |
 poisoning? |      Freq.     Percent        Cum.
------------+-----------------------------------
        Yes |      1,008       10.08       10.08
         No |      8,992       89.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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