The RBZ demonetized old bank notes on 1 August 2006 and introduced a new currency. Each new Zimbabwe dollar was worth 1000 old Zimbabwe dollars.Slashes Zeros, AllAfrica, 1 August 2006 (subscription required) (accessed 2 August 2008) The highest denominations for the new currency were 1, 10, and 100 thousand revalued dollars. A year later on 1 August 2007, he authorized a 200 thousand dollar denomination. This marked the start of a series of new denominations issued in rapid succession, including 250, 500, and 750 thousand dollars (20 December 2007); 1, 5, and 10 million dollars (16 January 2008); 25 and 50 million dollars (4 April 2008); 100 and 250 million dollars (5 May 2008); 500 million and 5, 25, and 50 billion dollars (20 May 2008); and 100 billion dollars (21 July 2008). From the time of currency revaluation to the beginning of June 2008 the money supply in the country increased from billion to more than quadrillion, or a 20,000,000 fold increase.
