Frequencies for first 10,000 rows of prescr6 variable in namcs2012 dataset :

          Prescription status code for |
                          medication 6 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        973        9.73        9.73
                  Nonprescription drug |         49        0.49       10.22
                          Undetermined |         41        0.41       10.63
Both Prescription and Over-The-Counter |        384        3.84       14.47
                                     . |      8,553       85.53      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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