Frequencies for first 10,000 rows of diagscrn variable in nhamcsed2011 dataset :

       Were |
diagnostic/ |
  screening |
   services |
 ordered or |
provided at |
this visit? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      2,843       28.43       28.43
        Yes |      6,948       69.48       97.91
  No answer |        209        2.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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