100 years of "you're a grand old flag"

This year we celebrate 100 years of one of the best patriotic songs: You're a grand old flag.
Music and Sheet Music here: http://memory.loc.gov/cocoon/ihas/loc.natlib.ihas.200000026/default.html

It was originally sung: You're a grand old rag. It was the first song from a musical to sell over 1 million copies of sheet music.