Frequencies for first 10,000 rows of therprev variable in nhamcsopd2001 dataset :

              was |
couns/educ/therap |
     y ordered or |
        provided? |      Freq.     Percent        Cum.
------------------+-----------------------------------
               No |      4,730       47.30       47.30
              Yes |      5,092       50.92       98.22
Entire item blank |        178        1.78      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

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