One of the most successful collection programs is the 50 State Quarters program developed by the U.S. Mint. This program began in 1999 and permitted each state to put a design on the back of the U.S. quarter. There are 5 state quarters issued each year over the 10-year program. According to CoinWorld.com, in 1999 4.43 billion quarters were minted across the first five states issued. In 2000, the U.S. Mint increased the mintage by 46%. What was the number of state quarters minted in 2000?