Frequencies for first 10,000 rows of prescr5 variable in namcs2011 dataset :

   Medication #5 - Prescription status |
                                  code |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |      1,739       17.39       17.39
                  Nonprescription drug |         66        0.66       18.05
                          Undetermined |         47        0.47       18.52
Both Prescription and Over-The-Counter |        453        4.53       23.05
                                     . |      7,695       76.95      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016