Frequencies for first 10,000 rows of prescr19 variable in nhamcsed2015 dataset 

        Prescription status code for |
                      medication #19 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         20        0.20        0.20
Prescription or Nonprescription drug |         14        0.14        0.34
                                   . |      9,966       99.66      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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