Frequencies for first 10,000 rows of prescr9 variable in nhamcsed2014 dataset :

        Prescription status code for |
                       medication #9 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        187        1.87        1.87
                Nonprescription drug |          6        0.06        1.93
                        Undetermined |          3        0.03        1.96
Prescription or Nonprescription drug |         68        0.68        2.64
                                   . |      9,736       97.36      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 11 Apr 2017