Beginning in 1915, the Federal Reserve Bulletin included data on currency that had been collected by the Treasury and data on total bank deposits that had been collected by the Office of the Comptroller of the Currency as a byproduct of its regulatory role, but publication was irregular.
Of the ten new Member States that joined the EU in May 2004, three entered the Exchange Rate Mechanism II (ERM II) in late June 2004, and another four countries joined the mechanism in 2005. All seven of these countries have expressed an interest in adopting the euro in the coming years. Participation in ERM II is a necessary pre-condition for adopting the euro.