Frequencies for first 10,000 rows of prescr4 variable in nhamcsopd2011 dataset :

Prescription status code for Medication |
                                     #4 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      Prescription drug |      1,982       19.82       19.82
                   Nonprescription drug |         84        0.84       20.66
                           Undetermined |         48        0.48       21.14
Both prescription and OTC (over the cou |        630        6.30       27.44
                                      . |      7,256       72.56      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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