Frequencies for first 10,000 rows of prescr6 variable in namcs2013 dataset :

          Prescription status code for |
                         medication #6 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |      1,345       13.45       13.45
                  Nonprescription drug |         77        0.77       14.22
                          Undetermined |         61        0.61       14.83
Both Prescription and Over-The-Counter |        452        4.52       19.35
                                     . |      8,065       80.65      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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