We are a Netherlands company and we derive our revenue from services and product sales to clients primarily in the oil and gas industry.  Revenue is attributed to the country in which the revenue is earned. No single client accounted for 10% or more of revenue in any of  the periods presented. The following tables show a summary of our U.S. and non-U.S. operations and a breakdown between services  and product sales for December 31, 2013, 2012 and 2011 (in thousands): (1)  Revenue earned in other countries, including The Netherlands, was not individually greater than 10% of our consolidated revenue in 2013, 2012 or 2011. (2)  Property, plant and equipment, net in other countries, including The Netherlands, were not individually greater than 10% of our consolidated fixed assets  in 2013, 2012 or 2011. GEOGRAPHIC INFORMATION United States Canada Other  Countries (1)(2) Consolidated December 31, 2013 Revenue $ 507,239 $ 120,697 $ 445,572 $ 1,073,508  Property, plant and equipment, net 73,870 17,195 47,759 138,824 December 31, 2012 Revenue $ 505,200 $ 101,387 $ 374,493 $ 981,080  Property, plant and equipment, net 66,092 17,263 42,063 125,418 December 31, 2011 Revenue $ 470,600 $ 85,287 $ 351,761 $ 907,648  Property, plant and equipment, net 53,566 20,113 41,616 115,295 For the Years Ended December 31, Segment Breakdown Between Services / Product Sales 2013 2012 2011 Reservoir Description Services $ 493,402 $ 472,426 $ 443,050 Production Enhancement Services 209,770 161,679 129,400 Reservoir Management Services 62,256 59,790 49,302 Total Revenue - Services $ 765,428 $ 693,895 $ 621,752 Reservoir Description Product sales $ 28,849 $ 23,103 $ 26,725 Production Enhancement Product sales 242,645 242,113 242,049 Reservoir Management Product sales 36,586 21,969 17,122 Total Revenue - Product sales $ 308,080 $ 287,185 $ 285,896 Total Revenue $ 1,073,508 $ 981,080 $ 907,648 61