Frequencies for first 10,000 rows of prescr7 variable in namcs2014 dataset :

          Prescription status code for |
                         medication #7 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |      1,194       11.94       11.94
                  Nonprescription drug |         71        0.71       12.65
                          Undetermined |         44        0.44       13.09
Both Prescription and Over-The-Counter |        514        5.14       18.23
                                     . |      8,177       81.77      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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