Frequencies for first 10,000 rows of prescr3 variable in nhamcsopd2009 dataset :

      for rx3, prescription status code |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      prescription drug |      2,731       27.31       27.31
                   nonprescription drug |        200        2.00       29.31
                           undetermined |         63        0.63       29.94
both prescription and otc (over the cou |        613        6.13       36.07
                                      . |      6,393       63.93      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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