Frequencies for first 10,000 rows of prescr28 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #28 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |         10        0.10        0.10
                          Undetermined |          1        0.01        0.11
Both Prescription and Over-The-Counter |          1        0.01        0.12
                                     . |      9,988       99.88      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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