Frequencies for first 10,000 rows of prescr5 variable in nhamcsed2013 dataset :

 Prescription status code medication |
                                  #5 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        823        8.23        8.23
                Nonprescription drug |         19        0.19        8.42
                        Undetermined |         20        0.20        8.62
Prescription or Nonprescription drug |        343        3.43       12.05
                                   . |      8,795       87.95      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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