Frequencies for first 10,000 rows of prescr2 variable in namcs2014 dataset :

          Prescription status code for |
                         medication #2 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |      4,169       41.69       41.69
                  Nonprescription drug |        172        1.72       43.41
                          Undetermined |        161        1.61       45.02
Both Prescription and Over-The-Counter |      1,223       12.23       57.25
                                     . |      4,275       42.75      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 27 Mar 2017