Frequencies for first 10,000 rows of prescr1 variable in nhamcsopd2011 dataset :

Prescription status code for Medication |
                                     #1 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      Prescription drug |      4,985       49.85       49.85
                   Nonprescription drug |        537        5.37       55.22
                           Undetermined |        147        1.47       56.69
Both prescription and OTC (over the cou |      1,293       12.93       69.62
                                      . |      3,038       30.38      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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