The Plumbers' Waltz (Super Mario Bros theme in 3/4 time)

This is a waltz arrangement of the Super Mario Bros theme song. Although I can play the melody notes, I'm only providing the accompaniment chords at this time. Each chord shown below represents a full measure of three beats (or two beats, if you're playing it the traditional way).

Intro: A7 A7 D D
||: D D D G D G D A7 :||
||: D A7 D G D A7 D D
    D A7 D G Bb C D D :||
Bb Bb D D Bb Bb D D
Bb Bb D D D D A7 A7
||: D D G G A7 A7 D D :|| (different tune, same chords)
Ending 1: D D D D Bb Bb Bb Bb C C C C D D D D
Ending 2 (ritardando): D D G Gm D