Frequencies for first 10,000 rows of ebillrec variable in namcs2004 dataset :

       does |
   practice |
     submit |
     claims |
electronica |
       lly? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        134        1.34        1.34
          1 |      7,725       77.25       78.59
          2 |      1,628       16.28       94.87
          3 |        513        5.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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