Frequencies for first 10,000 rows of prescr5 variable in nhamcsed2011 dataset :

 Prescription status code medication |
                                  #5 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   Prescription drug |        656        6.56        6.56
                Nonprescription drug |         20        0.20        6.76
                        Undetermined |         10        0.10        6.86
Prescription or Nonprescription drug |        235        2.35        9.21
                                   . |      9,079       90.79      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016