Frequencies for first 10,000 rows of prescr14 variable in nhamcsed2015 dataset 

        Prescription status code for |
                      medication #14 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         80        0.80        0.80
                Nonprescription drug |          2        0.02        0.82
Prescription or Nonprescription drug |         19        0.19        1.01
                                   . |      9,899       98.99      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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