The agency determined in FY 2007 that 99 percent of its facilities met those standards. They stated that the reliability index may fall below 90 percent in FY 2009 and later. Much of Reclamation's current infrastructure is now 50 or more years old, and its proper operation and maintenance are important to the sustained delivery of water services. However early reclamation cost-sharing policy resulted in repayments to the government falling short of planned levels. This led to a series of changes in the repayment provisions culminating with legislation in the 1930s that completely revised reclamation policy from total repayment of construction cost to repayment of those costs based on ability to pay basis. Since that time, charges for Reclamation supplied irrigation water have generally not been required to reflect the construction cost of water supply.