Frequencies for first 10,000 rows of prescr12 variable in nhamcsed2013 dataset :

        Prescription status code for |
                      medication #12 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         41        0.41        0.41
                Nonprescription drug |          1        0.01        0.42
                        Undetermined |          1        0.01        0.43
Prescription or Nonprescription drug |         15        0.15        0.58
                                   . |      9,942       99.42      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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