Frequencies for first 10,000 rows of prescr26 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #26 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |         12        0.12        0.12
                  Nonprescription drug |          2        0.02        0.14
Both Prescription and Over-The-Counter |          4        0.04        0.18
                                     . |      9,982       99.82      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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