Frequencies for first 10,000 rows of therprev variable in nhamcsopd1999 dataset :

       were |
therapeutic |
 /prev serv |
ordered/pro |
     vided? |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      5,943       59.43       59.43
        Yes |      4,057       40.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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