In Marvel comics, T'Challa (aka The Black Panther) as the king of Wakanda is estimated to be worth 90 trillion (9 x 1013) dollars. Tony Stark (aka Iron Man) is only worth about 30 billion (3 x 1010) dollars. If Tony Stark could somehow add a 10% increase in his wealth to his current worth each year ($30 billion, $63 billion, $99.3 billion, etc.), how many years would it take to reach T'Challa? Round your answer to the nearest year.​