Frequencies for first 10,000 rows of prescr10 variable in nhamcsed2012 dataset :

        Prescription status code for |
                      medication #10 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |         82        0.82        0.82
                Nonprescription drug |          4        0.04        0.86
                        Undetermined |          1        0.01        0.87
Prescription or Nonprescription drug |         39        0.39        1.26
                                   . |      9,874       98.74      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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