Frequencies for first 10,000 rows of prescr1 variable in nhamcsopd2010 dataset :

               prescription status code |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      prescription drug |      5,446       54.46       54.46
                   nonprescription drug |        374        3.74       58.20
                           undetermined |        160        1.60       59.80
both prescription and otc (over the cou |      1,146       11.46       71.26
                                      . |      2,874       28.74      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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