Frequencies for first 10,000 rows of prescr8 variable in namcs2012 dataset :

          Prescription status code for |
                          medication 8 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        618        6.18        6.18
                  Nonprescription drug |         47        0.47        6.65
                          Undetermined |         18        0.18        6.83
Both Prescription and Over-The-Counter |        222        2.22        9.05
                                     . |      9,095       90.95      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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