Frequencies for first 10,000 rows of diagscrn variable in nhamcsopd2004 dataset :

  were diagnostic |
 services ordered |
     or provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               no |      1,040       10.40       10.40
              yes |      8,897       88.97       99.37
entire item blank |         63        0.63      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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