Frequencies for first 10,000 rows of arthrtis variable in nhamcsopd2009 dataset :

       does |
patient now |
      have: |
  arthritis |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,095       90.95       90.95
        yes |        905        9.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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