Frequencies for first 10,000 rows of prescr24 variable in nhamcsed2015 dataset 

        Prescription status code for |
                      medication #24 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         13        0.13        0.13
Prescription or Nonprescription drug |          4        0.04        0.17
                                   . |      9,983       99.83      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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