Frequencies for first 10,000 rows of prescr12 variable in nhamcsed2014 dataset :

        Prescription status code for |
                      medication #12 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         87        0.87        0.87
                Nonprescription drug |          1        0.01        0.88
                        Undetermined |          2        0.02        0.90
Prescription or Nonprescription drug |         31        0.31        1.21
                                   . |      9,879       98.79      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017