Truck shipments to the British in the Middle East in 1941

The War Office had told General Wavell in October that 3,000 3-ton trucks would be shipped to the Middle East, every month, from North America, and that 7,000 would be shipped by the end of 1940. The reality was pretty grim: in early 1941, the shipments were only 616 in March, 863 in April, and 1,276 in May. Much of the Middle East transportation had been shipped to Greece, and was lost there. I imagine that this includes what was sent to Crete before the German attack. The distances in the Middle East were vast, and demanded large numbers of vehicles to move supplies and fuel. It was logistic nightmare for both sides. This is from the Official History of the Second World War The Mediterranean and the Middle East, Vol.II.