Frequencies for first 10,000 rows of prescr15 variable in nhamcsed2015 dataset 

        Prescription status code for |
                      medication #15 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         52        0.52        0.52
                Nonprescription drug |          5        0.05        0.57
                        Undetermined |          1        0.01        0.58
Prescription or Nonprescription drug |         21        0.21        0.79
                                   . |      9,921       99.21      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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