Frequencies for first 10,000 rows of prescr24 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #24 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |         18        0.18        0.18
                  Nonprescription drug |          2        0.02        0.20
                          Undetermined |          3        0.03        0.23
Both Prescription and Over-The-Counter |          4        0.04        0.27
                                     . |      9,973       99.73      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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