Frequencies for first 10,000 rows of diagscrn variable in nhamcsopd2000 dataset :

       were |
diag/screen |
   services |
ordered/pro |
     vided? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      2,163       21.63       21.63
        Yes |      7,578       75.78       97.41
  No answer |        259        2.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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