Frequencies for first 10,000 rows of privins variable in nhamcsopd1993 dataset :

   expected |
  source of |
payment-pri |
  vate/comm |
      insur |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,230       82.30       82.30
          1 |      1,770       17.70      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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