Frequencies for first 10,000 rows of diagscrn variable in namcs2000 dataset :

       were |
diag/screen |
   services |
ordered/pro |
     vided? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      2,729       27.29       27.29
        Yes |      7,126       71.26       98.55
  No answer |        145        1.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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