Frequencies for first 10,000 rows of prescr7 variable in namcs2012 dataset :

          Prescription status code for |
                          medication 7 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        784        7.84        7.84
                  Nonprescription drug |         52        0.52        8.36
                          Undetermined |         23        0.23        8.59
Both Prescription and Over-The-Counter |        273        2.73       11.32
                                     . |      8,868       88.68      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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