Frequencies for first 10,000 rows of prescr8 variable in nhamcsed2011 dataset :

        Prescription status code for |
                       medication #8 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        147        1.47        1.47
                Nonprescription drug |          5        0.05        1.52
                        Undetermined |          2        0.02        1.54
Prescription or Nonprescription drug |         53        0.53        2.07
                                   . |      9,793       97.93      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016