Frequencies for first 10,000 rows of prescr6 variable in nhamcsed2015 dataset :

        Prescription status code for |
                       medication #6 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        682        6.82        6.82
                Nonprescription drug |         22        0.22        7.04
                        Undetermined |          9        0.09        7.13
Prescription or Nonprescription drug |        277        2.77        9.90
                                   . |      9,010       90.10      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Nov 2017