Frequencies for first 10,000 rows of diagscrn variable in nhamcsed2007 dataset :

       were |
 diagnostic |
   services |
 ordered or |
  provided? |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      2,813       28.13       28.13
        yes |      6,927       69.27       97.40
  no answer |        260        2.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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