Frequencies for first 10,000 rows of prescr2 variable in nhamcsopd2011 dataset :

Prescription status code for Medication |
                                     #2 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      Prescription drug |      3,696       36.96       36.96
                   Nonprescription drug |        196        1.96       38.92
                           Undetermined |        101        1.01       39.93
Both prescription and OTC (over the cou |        987        9.87       49.80
                                      . |      5,020       50.20      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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