Historical Forex chart :

In 1967, a Chicago bank refused a college professor by the name of Milton Friedman a loan in pound sterling because he had intended to use the funds to short the British currency. Friedman, who had perceived sterling to be priced too high against the dollar, wanted to sell the currency, then later buy it back to repay the bank after the currency declined, thus pocketing a quick profit. The bank’s refusal to grant the loan was due to the Bretton Woods Agreement, established twenty years earlier, which fixed national currencies against the dollar, and set the dollar at a rate of $35 per ounce of gold.

Table for 1950 to 2000