Frequencies for first 10,000 rows of prescr21 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #21 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |         37        0.37        0.37
                  Nonprescription drug |          6        0.06        0.43
                          Undetermined |          5        0.05        0.48
Both Prescription and Over-The-Counter |         18        0.18        0.66
                                     . |      9,934       99.34      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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