Frequencies for first 10,000 rows of diagscrn variable in nhamcsed2001 dataset :

       were |
diag/screen |
       serv |
 ordered or |
  provided? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      1,237       12.37       12.37
        Yes |      8,551       85.51       97.88
  No answer |        212        2.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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