Frequencies for first 10,000 rows of paydk variable in namcs2014 dataset :

   Expected |
  source of |
payment for |
     visit: |
    Unknown |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,766       97.66       97.66
        Yes |        234        2.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017