Frequencies for first 10,000 rows of prescr8 variable in nhamcsopd2009 dataset :

      for rx8, prescription status code |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      prescription drug |        718        7.18        7.18
                   nonprescription drug |         33        0.33        7.51
                           undetermined |         10        0.10        7.61
both prescription and otc (over the cou |        195        1.95        9.56
                                      . |      9,044       90.44      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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