Many years ago, Mr. Blonde opened an IRA account (Account 1) and made a deposit of $10,000. Since opening Account 1, it has earned an annual return of 4% per year. Exactly two years ago, Mr. Blonde opened two more IRA accounts (Account 2 and Account 3) and deposited $15,000 into Account 2 and $20,000 into Account 3. Account 2 has earned an annual return of 5% each year since it was opened. Account 3 earned an annual return of 4% in the first year after it was opened and an annual return of 9% in the year after that. Today, the sum of the three account balances is $54,604.54. Assume that he did not make any additional deposits or withdrawals. How many years have passed since Mr. Blonde opened Account 1?