Results of Operations  -33-  The following table subdivides vessel operating costs presented above by the company’s International and  United States segments and its related percentage of total revenue for the fiscal years ended March 31.  (A) For fiscal 2010, 2009 and 2008, Chevron Corporation (including its worldwide subsidiaries and affiliates) accounted for 18.3%,  19.1% and 16.3%, respectively, of total revenues while Petroleo Brasileiro SA accounted for 13.1%, 10.1% and 10.5% of total  revenues, respectively. The following table compares revenues and operating expenses (excluding general and administrative  expenses, depreciation expense, provision for Venezuelan operations, and gains on asset dispositions) for  the company’s vessel fleet and the related percentage of total revenue for the years ended March 31.  Vessel revenues and operating costs relate to vessels owned and operated by the company, while other  marine revenues relate to third-party activities of the company's shipyards, brokered vessels and other  miscellaneous marine-related activities. Brokers’ commission costs are incurred primarily in the company’s international operations where brokers  assist in obtaining work for the company’s vessels. Brokers generally are paid a percentage of day rates  and, accordingly, commissions paid to brokers generally fluctuate in accordance with vessel revenue. Other  costs include, but are not limited to, satellite communication fees, agent fees, port fees, canal transit fees,  vessel certification fees and temporary vessel importation fees.   (In thousands)  2010  %  2009  %  2008  % Revenues (A):  Vessel revenues:  International $ 1,048,553 90% 1,209,426 87% 1,055,339 83% United States 89,609 8% 146,896 11% 159,795 13% 1,138,162 97% 1,356,322 98% 1,215,134 96% Other marine revenues  30,472  3%  34,513  2%  55,037  4%  Total revenues $ 1,168,634 100% 1,390,835 100% 1,270,171 100% Operating costs:  Vessel operating costs:  Crew costs $ 320,229 27% 357,249 26% 314,330 25% Repair and maintenance 104,413 9% 119,672 9% 106,357 8% Insurance and loss reserves  12,948  1%  12,817  1%  23,667  2%  Fuel, lube and supplies  56,637  5%  65,249  5%  50,933  4%  Vessel operating leases 15,054 1% 6,996 1% 4,699 <1% Other 95,978 8% 98,893 7% 84,760 7% 605,259 52% 660,876 48% 584,746 46% Costs of other marine revenues  27,387  2%  29,282  2%  47,423  4%  Total  $ 632,646 54% 690,158 50% 632,169 50% (In thousands)  2010  %  2009  %  2008  % International vessel operating costs:  Crew costs $ 286,500 25% 300,401 22% 251,272 20% Repair and maintenance 94,882 8% 108,115 8% 91,089 7% Insurance and loss reserves  9,176  1%  9,130  1%  15,487  1%  Fuel, lube and supplies  54,403  5%  62,392  4%  47,990  4%  Vessel operating leases 11,907 1% 3,849 <1% 2,613 <1% Other 94,384 8% 94,751 7% 77,259 6% 551,252 47% 578,638 42% 485,710 38% United States vessel operating costs:  Crew costs $ 33,729 3% 56,848 4% 63,058 5% Repair and maintenance 9,531 1% 11,557 1% 15,268 1% Insurance and loss reserves  3,772  <1%  3,687  <1%  8,180  1%  Fuel, lube and supplies  2,234  <1%  2,857  <1%  2,943  <1%  Vessel operating leases 3,147 <1% 3,147 <1% 2,086 <1% Other 1,594 <1% 4,142 <1% 7,501 1% 54,007 5% 82,238 6% 99,036 8% Total vessel operating costs  $  605,259  52%  660,876  48%  584,746  46% 