Frequencies for first 10,000 rows of hmo variable in namcs1994 dataset :

   expected |
  source of |
  payment - |
    hmo/oth |
    prepaid |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,744       77.44       77.44
          1 |      2,256       22.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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