Frequencies for first 10,000 rows of drg3ing5 variable in nhamcsopd2003 dataset :

  ingredient code #5 for medication |
                                 #3 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                          vitamin a |         12        0.12        0.12
                   neomycin sulfate |          1        0.01        0.13
                      cod liver oil |          1        0.01        0.14
                                  . |      9,986       99.86      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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