Frequencies for first 10,000 rows of prescr10 variable in nhamcsed2013 dataset :

        Prescription status code for |
                      medication #10 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         89        0.89        0.89
                Nonprescription drug |          5        0.05        0.94
                        Undetermined |          2        0.02        0.96
Prescription or Nonprescription drug |         31        0.31        1.27
                                   . |      9,873       98.73      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Nov 2016