Frequencies for first 10,000 rows of mcare13 variable in h84 dataset :

 PID COV BY |
   MEDICARE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,165       11.65       11.65
          2 |      8,835       88.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Feb 2018