Frequencies for first 10,000 rows of prescr5 variable in nhamcsopd2009 dataset :

      for rx5, prescription status code |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      prescription drug |      1,662       16.62       16.62
                   nonprescription drug |         87        0.87       17.49
                           undetermined |         31        0.31       17.80
both prescription and otc (over the cou |        389        3.89       21.69
                                      . |      7,831       78.31      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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