Frequencies for first 10,000 rows of diagscrn variable in nhamcsed2004 dataset :

       were |
diag/screen |
       serv |
 ordered or |
  provided? |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |        889        8.89        8.89
        yes |      8,947       89.47       98.36
  no answer |        164        1.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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