Total Truck segment gross margins for 2010 increased primarily as a result of higher truck gross margins. Gross  margins on trucks increased to 5.2% in 2010, reflecting higher average truck selling prices from increased market  demand and increased absorption of fixed costs resulting from the increase in truck production. 2010 aftermarket  parts gross margins increased due to improved price realization. Truck R&D expenditures increased to $238.2 million in 2010 from $198.5 million in 2009. The higher spending  reflects increased new product development activities, primarily new truck products for North America and Europe. Truck SG&A was $368.3 million in 2010 compared to $341.4 million in 2009. The higher spending is primarily due  to higher salaries and related expenses ($22.8 million) and sales and marketing activities ($3.4 million), partially  offset by lower severance costs ($5.0 million). As a percentage of sales, SG&A decreased to 4.0% in 2010 from 4.9%  in 2009 due to higher sales volumes. ($ in millions) Year ended December 31, 2010 2009 %  CHANGE New loan and lease volume: U.S. and Canada  $1,409.4  $ 1,175.0 20 Europe  593.7 433.5 37 Mexico and Australia  473.0 306.1 55 $2,476.1  $ 1,914.6 29 New loan and lease volume by product: Loans and finance leases  $1,975.1  $ 1,395.1 42 Equipment on operating lease  501.0 519.5 (4) $2,476.1  $ 1,914.6 29 New loan and lease unit volume: Loans and finance leases  24,100 18,300 32 Equipment on operating lease  5,600 5,900 (5) 29,700 24,200 23 Average earning assets: U.S. and Canada  $4,320.6  $ 4,795.5 (10) Europe  1,944.5  2,535.9 (23) Mexico and Australia  1,303.2 1,321.9 (1) $7,568.3  $ 8,653.3 (13) Average earning assets by product: Loans and finance leases  $5,119.9  $ 5,904.1 (13) Dealer wholesale financing  899.1  1,221.2 (26) Equipment on operating lease  1,549.3 1,528.0 1 $7,568.3  $ 8,653.3 (13) Revenues: U.S. and Canada  $ 491.6  $  501.8 (2) Europe  286.6 318.5 (10) Mexico and Australia  189.6 189.5 $ 967.8  $ 1,009.8 (4) Revenue by product: Loans and finance leases  $ 383.8  $  449.3 (15) Dealer wholesale financing  37.8 52.5 (28) Equipment on operating lease and other  546.2 508.0 8 $ 967.8  $ 1,009.8 (4) Income before income taxes  $ 153.5  $  84.6 81 Financial Services  