Frequencies for first 10,000 rows of prescr27 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #27 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |          9        0.09        0.09
                  Nonprescription drug |          3        0.03        0.12
Both Prescription and Over-The-Counter |          3        0.03        0.15
                                     . |      9,985       99.85      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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