Revenues and operating profit derived from International and United States marine operations and total  marine assets for the International and United States segment for each of the fiscal years ended March 31  are summarized below: Please refer to Item 7 of this report and Note 13 of Notes to Consolidated Financial Statements included in  Item 8 of this report for further discussion of segment revenues, operating profit, and total asset by  geographical areas in which the company operates. In calendar year 2000, the company embarked on a significant vessel construction and acquisition program.  This program facilitated the company’s entrance into deepwater markets around the world and allowed the  company to begin replacing its then existing fleet with fewer, larger, and more technologically sophisticated  vessels. The vessel construction, acquisition and expansion program was initiated with the intent of  strengthening the company’s presence in all major oil and gas producing regions of the world through the  replacement of aging vessels in the company’s fleet. During this decade, the company purchased and/or  constructed 185 vessels for approximately $2.4 billion. To date, the company has funded all of its vessel  commitment programs from its available cash, operating cash flow, and funds provided by the private  placement of $300.0 million in senior unsecured notes, revolving credit facilities, and various leasing  arrangements. The company’s strategy contemplates organic growth through the construction of vessels at a variety of  shipyards worldwide and possible acquisitions of vessels and/or other owners and operators of offshore  supply vessels. The company has the largest number of new vessels among its competitors in the industry,  and it also has the largest fleet of older vessels in the industry. Management regularly evaluates alternatives  for its older fleet. The company intends to pursue its long-term fleet replenishment and modernization  strategy on a disciplined basis and, in each case, will carefully consider whether proposed investments and  transactions have the appropriate risk/reward profile. The average age of the company's 377 owned or chartered vessel fleet (including stacked vessels but  excluding joint-venture vessels and vessels withdrawn from service) at March 31, 2010 was approximately  17.8 years. The average age of the 170 vessels that the company acquired or constructed since calendar  year 2000 as part of its new build and acquisition program was approximately 5.4 years. The remaining  207 vessels have an average age of 28.0 years. Of the company’s 377 vessels, 58 are deepwater class  vessels, 224 are in the towing-supply/supply class vessels, 68 are crew/utility class vessels and 27 are  offshore tugs. At March 31, 2010, the company had commitments to acquire five vessels and build 31 vessels at a number  of different shipyards around the world (one of which is being constructed in the United States by the  Our Global Vessel Fleet  (In thousands)  2010 2009 2008 Revenues:  Vessel revenues: International $ 1,048,553 1,209,426 1,055,339 United States 89,609 146,896 159,795 Other marine revenues  30,472  34,513  55,037  $ 1,168,634 1,390,835 1,270,171 Marine operating profit:  Vessel activity:  International $ 252,354 437,695 394,789 United States 9,196 34,797 29,985 261,550 472,492 424,774 Corporate expenses  (51,432)  (38,622)  (40,974)  Gain on asset dispositions, net  28,178  27,251  11,449  Other marine services  2,034  4,348  6,776  Operating income  $  240,330  465,469  402,025  Total marine assets:  International $ 2,822,058 2,575,637 2,117,373 United States 334,182 394,129 387,433 Total marine assets  $ 3,156,240  2,969,766  2,504,806  -7- 