Frequencies for first 10,000 rows of prescr8 variable in nhamcsed2012 dataset :

        Prescription status code for |
                       medication #8 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        172        1.72        1.72
                Nonprescription drug |          7        0.07        1.79
                        Undetermined |          2        0.02        1.81
Prescription or Nonprescription drug |         95        0.95        2.76
                                   . |      9,724       97.24      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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