Frequencies for first 10,000 rows of prescr9 variable in namcs2013 dataset :

          Prescription status code for |
                         medication #9 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        658        6.58        6.58
                  Nonprescription drug |         40        0.40        6.98
                          Undetermined |         19        0.19        7.17
Both Prescription and Over-The-Counter |        280        2.80        9.97
                                     . |      9,003       90.03      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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