Just so you know Iron Dome doesn't try to intercept all rockets. When a rocket is launched they know the vicinity of where it will land. If it's out in the middle of nowhere they just let it go and report it as a rocket fired into Israel. If a rocket has a chance to land to where it could do damage, then Iron Dome fires 2-3 rockets to try to take it out.
I can see why the numbers may be misleading, and I really think Israel should announce how many rockets they fired upon.
Also somebody pointed out in this thread that the US bought them for Israel and gave them all the stuff to make them. Actually Iron Dome was 100% built and designed by a company in Israel. The US did give them some money to build more of them. Also they are in talks to trade the technology and have some of them built right here in the US and shipped to bases over seas.