Frequencies for first 10,000 rows of prescr22 variable in namcs2014 dataset :

          Prescription status code for |
                        medication #22 |      Freq.     Percent        Cum.
---------------------------------------+-----------------------------------
                     Prescription drug |         28        0.28        0.28
                  Nonprescription drug |          5        0.05        0.33
                          Undetermined |          2        0.02        0.35
Both Prescription and Over-The-Counter |         10        0.10        0.45
                                     . |      9,955       99.55      100.00
---------------------------------------+-----------------------------------
                                 Total |     10,000      100.00

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