Frequencies for first 10,000 rows of prescr8 variable in namcs2011 dataset :

   Medication #8 - Prescription status |
                                  code |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |        688        6.88        6.88
                  Nonprescription drug |         36        0.36        7.24
                          Undetermined |         12        0.12        7.36
Both Prescription and Over-The-Counter |        242        2.42        9.78
                                     . |      9,022       90.22      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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