Frequencies for first 10,000 rows of prescr1 variable in nhamcsed2010 dataset :

 Prescription status code for med #1 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                   prescription drug |      5,453       54.53       54.53
                nonprescription drug |        123        1.23       55.76
                        undetermined |         70        0.70       56.46
prescription or nonprescription drug |      2,214       22.14       78.60
                                   . |      2,140       21.40      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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