Financial report context:
affiliated company . the loss recorded on the sale was approximately $ 14 million and is recorded as a loss on sale of assets and asset impairment expenses in the accompanying consolidated statements of operations . in the second quarter of 2002 , the company recorded an impairment charge of approximately $ 40 million , after income taxes , on an equity method investment in a telecommunications company in latin america held by edc . the impairment charge resulted from sustained poor operating performance coupled with recent funding problems at the invested company . during 2001 , the company lost operational control of central electricity supply corporation ( 2018 2018cesco 2019 2019 ) , a distribution company located in the state of orissa , india . cesco is accounted for as a cost method investment . in may 2000 , the company completed the acquisition of 100% ( 100 % ) of tractebel power ltd ( 2018 2018tpl 2019 2019 ) for approximately $ 67 million and assumed liabilities of approximately $ 200 million . tpl owned 46% ( 46 % ) of nigen . the company also acquired an additional 6% ( 6 % ) interest in nigen from minority stockholders during the year ended december 31 , 2000 through the issuance of approximately 99000 common shares of aes stock valued at approximately $ 4.9 million . with the completion of these transactions , the company owns approximately 98% ( 98 % ) of nigen 2019s common stock and began consolidating its financial results beginning may 12 , 2000 . approximately $ 100 million of the purchase price was allocated to excess of costs over net assets acquired and was amortized through january 1 , 2002 at which time the company adopted sfas no . 142 and ceased amortization of goodwill . in august 2000 , a subsidiary of the company acquired a 49% ( 49 % ) interest in songas limited ( 2018 2018songas 2019 2019 ) for approximately $ 40 million . the company acquired an additional 16.79% ( 16.79 % ) of songas for approximately $ 12.5 million , and the company began consolidating this entity in 2002 . songas owns the songo songo gas-to-electricity project in tanzania . in december 2002 , the company signed a sales purchase agreement to sell songas . the sale is expected to close in early 2003 . see note 4 for further discussion of the transaction . the following table presents summarized comparative financial information ( in millions ) for the company 2019s investments in 50% ( 50 % ) or less owned investments accounted for using the equity method. .

Financial table:
as of and for the years ended december 31,: revenues; 2002: $ 2832; 2001: $ 6147; 2000: $ 6241
as of and for the years ended december 31,: operating income; 2002: 695; 2001: 1717; 2000: 1989
as of and for the years ended december 31,: net income; 2002: 229; 2001: 650; 2000: 859
as of and for the years ended december 31,: current assets; 2002: 1097; 2001: 3700; 2000: 2423
as of and for the years ended december 31,: noncurrent assets; 2002: 6751; 2001: 14942; 2000: 13080
as of and for the years ended december 31,: current liabilities; 2002: 1418; 2001: 3510; 2000: 3370
as of and for the years ended december 31,: noncurrent liabilities; 2002: 3349; 2001: 8297; 2000: 5927
as of and for the years ended december 31,: stockholder's equity; 2002: 3081; 2001: 6835; 2000: 6206

Additional report context:
in 2002 , 2001 and 2000 , the results of operations and the financial position of cemig were negatively impacted by the devaluation of the brazilian real and the impairment charge recorded in 2002 . the brazilian real devalued 32% ( 32 % ) , 19% ( 19 % ) and 8% ( 8 % ) for the years ended december 31 , 2002 , 2001 and 2000 , respectively . the company recorded $ 83 million , $ 210 million , and $ 64 million of pre-tax non-cash foreign currency transaction losses on its investments in brazilian equity method affiliates during 2002 , 2001 and 2000 , respectively. .

Question: what was the percentage change in revenues for investments in 50% ( 50 % ) or less owned investments accounted for using the equity method between 2001 and 2002?
Answer: -54%