Frequencies for first 10,000 rows of prescr9 variable in namcs2012 dataset :

          Prescription status code for |
                         medication #9 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        454        4.54        4.54
                  Nonprescription drug |         39        0.39        4.93
                          Undetermined |         20        0.20        5.13
Both Prescription and Over-The-Counter |        198        1.98        7.11
                                     . |      9,289       92.89      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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