There is one instrumental that earns upward of around 3 million dollars a year. It is "Rock and Roll Pt. 2 By Gary Glitter. It is played during every football, baseball, basketball, hockey, game and is televised hundreds of times during all seasons. I think it is the top earner of instrumentals.
Now if Gary Glitter could stay out of prison for child molestation he could spend the money. I think he spends most of his money on lawyers.

MAB