Annual purchase commitments under various contracts as of May 31, 2021 were as follows (in millions):

	Aircraft and Aircraft Related		Other⁽¹⁾		Total
2022	$	1,898	$	1,025	$	2,923
2023		2,567		711		3,278
2024		1,017		512		1,529
2025		479		404		883
2026		432		347		779
Thereafter		2,325		252		2,577
Total	$	8,718	$	3,251	$	11,969

The amounts reflected in the table above for purchase commitments represent noncancelable agreements to purchase goods or services. As of May 31, 2021, our obligation to purchase six Boeing 777 Freighter (“B777F”) aircraft is conditioned upon there being no event that causes FedEx Express or its employees not to be covered by the Railway Labor Act of 1926, as amended. Open purchase orders that are cancelable are not considered unconditional purchase obligations for financial reporting purposes and are not included in the table above.

We have several aircraft modernization programs underway that are supported by the purchase of B777F and Boeing 767-300 Freighter (“B767F”) aircraft. These aircraft are significantly more fuel-efficient per unit than the aircraft types previously utilized, and these expenditures are necessary to achieve significant long-term operating savings and to replace older aircraft. Our ability to delay the timing of these aircraft-related expenditures is limited without incurring significant costs to modify existing purchase agreements.

As of May 31, 2021, we had $948 million in deposits and progress payments on aircraft purchases and other planned aircraft-related transactions. These deposits are classified in the “Other assets” caption of our accompanying consolidated balance sheets. Aircraft and aircraft-related contracts are subject to price escalations. The following table is a summary of the key aircraft we are committed to purchase as of May 31, 2021, with the year of expected delivery:

	Cessna SkyCourier 408		ATR 72-600F		B767F		B777F		Total
2022		9		9		13		4		35
2023		12		6		13		2		33
2024		12		6		4		4		26
2025		12		6		—		2		20
2026		5		1		—		—		6
Thereafter		—		—		—		—		—
Total		50		28		30		12		120

On June 22, 2021, FedEx Express exercised options to purchase an additional 20 B767F aircraft, ten of which will be delivered in 2024 and ten of which will be delivered in 2025.