Frequencies for first 10,000 rows of prescr5 variable in namcs2013 dataset :

          Prescription status code for |
                         medication #5 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |      1,757       17.57       17.57
                  Nonprescription drug |         96        0.96       18.53
                          Undetermined |         67        0.67       19.20
Both Prescription and Over-The-Counter |        550        5.50       24.70
                                     . |      7,530       75.30      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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