Frequencies for first 10,000 rows of prescr1 variable in nhamcsopd2009 dataset :

      for rx1, prescription status code |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      prescription drug |      4,998       49.98       49.98
                   nonprescription drug |        643        6.43       56.41
                           undetermined |        154        1.54       57.95
both prescription and otc (over the cou |        967        9.67       67.62
                                      . |      3,238       32.38      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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