Frequencies for first 10,000 rows of ortho variable in nhamcsed2002 dataset :

 orthopedic |
       care |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,485       94.85       94.85
          1 |        515        5.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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