Frequencies for first 10,000 rows of injury variable in nhamcsopd2011 dataset :

  Is injury |
      visit |
   related? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      8,666       86.66       86.66
        Yes |      1,334       13.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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