Frequencies for first 10,000 rows of prescr3 variable in namcs2014 dataset :

          Prescription status code for |
                         medication #3 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |      3,188       31.88       31.88
                  Nonprescription drug |        160        1.60       33.48
                          Undetermined |        119        1.19       34.67
Both Prescription and Over-The-Counter |        955        9.55       44.22
                                     . |      5,578       55.78      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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