Frequencies for first 10,000 rows of prescr25 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #25 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |          9        0.09        0.09
                          Undetermined |          1        0.01        0.10
Both Prescription and Over-The-Counter |         10        0.10        0.20
                                     . |      9,980       99.80      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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