Frequencies for first 10,000 rows of prescr7 variable in namcs2011 dataset :

   Medication #7 - Prescription status |
                                  code |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        943        9.43        9.43
                  Nonprescription drug |         43        0.43        9.86
                          Undetermined |         22        0.22       10.08
Both Prescription and Over-The-Counter |        311        3.11       13.19
                                     . |      8,681       86.81      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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