Frequencies for first 10,000 rows of prescr3 variable in namcs2013 dataset :

          Prescription status code for |
                         medication #3 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |      2,898       28.98       28.98
                  Nonprescription drug |        145        1.45       30.43
                          Undetermined |        131        1.31       31.74
Both Prescription and Over-The-Counter |        827        8.27       40.01
                                     . |      5,999       59.99      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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