Frequencies for first 10,000 rows of diagscrn variable in namcs1997 dataset :

       were |
diag/screen |
   services |
ordered/pro |
     vided? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      2,852       28.52       28.52
        Yes |      7,129       71.29       99.81
  No answer |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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