Frequencies for first 10,000 rows of prescr15 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #15 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        176        1.76        1.76
                  Nonprescription drug |         15        0.15        1.91
                          Undetermined |          7        0.07        1.98
Both Prescription and Over-The-Counter |         73        0.73        2.71
                                     . |      9,729       97.29      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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