Frequencies for first 10,000 rows of prescr29 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #29 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |          6        0.06        0.06
                  Nonprescription drug |          1        0.01        0.07
Both Prescription and Over-The-Counter |          2        0.02        0.09
                                     . |      9,991       99.91      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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