Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd2003 dataset :

 prescription status |
 code for medication |
                  #5 |      Freq.     Percent        Cum.
---------------------+-----------------------------------
   prescription drug |      1,034       10.34       10.34
nonprescription drug |        144        1.44       11.78
        undetermined |         85        0.85       12.63
                   . |      8,737       87.37      100.00
---------------------+-----------------------------------
               Total |     10,000      100.00

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