 In 2008, the inflation rate accelerated dramatically, from a rate in January of over 100,000% to an estimated rate of over 1,000,000% by May, and nearly 250,000,000% in July.As predicted by the quantity theory of money, this hyperinflation was linked to the Reserve Bank of Zimbabwe's choice to increase the money supply.The Reserve Bank of Zimbabwe responded to the dwindling value of the dollar by repeatedly arranging the printing of further banknotes, often at great expense from overseas suppliers.