future impairments would be recorded in income from continuing operations . the statement provides specific guidance for testing goodwill for impairment . the company had $ 3.2 billion of goodwill at december 31 , 2001 . goodwill amortization was $ 62 million for the year ended december 31 , 2001 . the company is currently assessing the impact of sfas no . 142 on its financial position and results of operations . in june 2001 , the fasb issued sfas no . 143 , 2018 2018accounting for asset retirement obligations , 2019 2019 which addresses financial accounting and reporting for obligations associated with the retirement of tangible long-lived assets and the associated asset retirement costs . this statement is effective for financial statements issued for fiscal years beginning after june 15 , 2002 . the statement requires recognition of legal obligations associated with the retirement of a long-lived asset , except for certain obligations of lessees . the company is currently assessing the impact of sfas no . 143 on its financial position and results of operations . in december 2001 , the fasb revised its earlier conclusion , derivatives implementation group ( 2018 2018dig 2019 2019 ) issue c-15 , related to contracts involving the purchase or sale of electricity . contracts for the purchase or sale of electricity , both forward and option contracts , including capacity contracts , may qualify for the normal purchases and sales exemption and are not required to be accounted for as derivatives under sfas no . 133 . in order for contracts to qualify for this exemption , they must meet certain criteria , which include the requirement for physical delivery of the electricity to be purchased or sold under the contract only in the normal course of business . additionally , contracts that have a price based on an underlying that is not clearly and closely related to the electricity being sold or purchased or that are denominated in a currency that is foreign to the buyer or seller are not considered normal purchases and normal sales and are required to be accounted for as derivatives under sfas no . 133 . this revised conclusion is effective beginning april 1 , 2002 . the company is currently assessing the impact of revised dig issue c-15 on its financial condition and results of operations . 2001 compared to 2000 revenues revenues increased $ 1.8 billion , or 24% ( 24 % ) to $ 9.3 billion in 2001 from $ 7.5 billion in 2000 . the increase in revenues is due to the acquisition of new businesses , new operations from greenfield projects and positive improvements from existing operations . excluding businesses acquired or that commenced commercial operations in 2001 or 2000 , revenues increased 5% ( 5 % ) to $ 7.1 billion in 2001 . the following table shows the revenue of each segment: .
based on the current amount of annual amortization , how many years will it take to fully amortize the goodwill balance at december 31 , 2001?
contract generation revenues increased $ 800 million , or 47% ( 47 % ) to $ 2.5 billion in 2001 from $ 1.7 billion in 2000 , principally resulting from the addition of revenues attributable to businesses acquired during 2001 or 2000 . excluding businesses acquired or that commenced commercial operations in 2001 or 2000 , contract generation revenues increased 2% ( 2 % ) to $ 1.7 billion in 2001 . the increase in contract generation segment revenues was due primarily to increases in south america , europe/africa and asia . in south america , contract generation segment revenues increased $ 472 million due mainly to the acquisition of gener and the full year of operations at uruguaiana offset by reduced revenues at tiete from the electricity rationing in brazil . in europe/africa , contract generation segment revenues increased $ 88 million , and the acquisition of a controlling interest in kilroot during 2000 was the largest contributor to the increase . in asia , contract generation segment revenues increased $ 96 million , and increased operations from our ecogen peaking plant was the most significant contributor to the .