Frequencies for first 10,000 rows of prescr5 variable in namcs2002 dataset :

 Prescription status |
 code for medication |
                  #5 |      Freq.     Percent        Cum.
---------------------+-----------------------------------
   Prescription drug |        696        6.96        6.96
Nonprescription drug |         80        0.80        7.76
        Undetermined |         63        0.63        8.39
                   . |      9,161       91.61      100.00
---------------------+-----------------------------------
               Total |     10,000      100.00

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