Frequencies for first 10,000 rows of prescr5 variable in nhamcsed2012 dataset :

 Prescription status code medication |
                                  #5 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        712        7.12        7.12
                Nonprescription drug |         25        0.25        7.37
                        Undetermined |          5        0.05        7.42
Prescription or Nonprescription drug |        308        3.08       10.50
                                   . |      8,950       89.50      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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