In 1934, the United States unilaterally changed the payment from gold coin to U.S. dollars per the Gold Reserve Act. The lease amount was set at US$3,386.25, based on the price of gold at the time. In 1973, the U.S. adjusted the lease amount to $3,676.50, and in 1974 to $4,085, based on further increases to the price of gold in USD. Payments have been sent annually, but only one lease payment has been accepted since the Cuban Revolution and Fidel Castro claimed that this check was deposited due to confusion in 1959. The Cuban government has not deposited any other lease checks since that time.