Frequencies for first 10,000 rows of prescr8 variable in nhamcsopd2010 dataset :

               prescription status code |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      prescription drug |        756        7.56        7.56
                   nonprescription drug |         54        0.54        8.10
                           undetermined |         22        0.22        8.32
both prescription and otc (over the cou |        197        1.97       10.29
                                      . |      8,971       89.71      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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