Frequencies for first 10,000 rows of prescr3 variable in nhamcsopd2011 dataset :

Prescription status code for Medication |
                                     #3 |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
                      Prescription drug |      2,737       27.37       27.37
                   Nonprescription drug |        145        1.45       28.82
                           Undetermined |         46        0.46       29.28
Both prescription and OTC (over the cou |        728        7.28       36.56
                                      . |      6,344       63.44      100.00
----------------------------------------+-----------------------------------
                                  Total |     10,000      100.00

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