Frequencies for first 10,000 rows of diagscrn variable in nhamcsopd2002 dataset :

       were |
 diagnostic |
   services |
 ordered or |
  provided? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,058       10.58       10.58
          1 |      8,852       88.52       99.10
          2 |         90        0.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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