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

    selfpay |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,699       86.99       86.99
          1 |      1,301       13.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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