pre_text: notes to consolidated financial statements ( continued ) note 1 2014summary of significant accounting policies ( continued ) present value is accreted over the life of the related lease as an operating expense . all of the company 2019s existing asset retirement obligations are associated with commitments to return property subject to operating leases to original condition upon lease termination . the following table reconciles changes in the company 2019s asset retirement liabilities for fiscal 2006 and 2005 ( in millions ) : .
post_text: long-lived assets including goodwill and other acquired intangible assets the company reviews property , plant , and equipment and certain identifiable intangibles , excluding goodwill , for impairment in accordance with sfas no . 144 , accounting for the impairment of long-lived assets and for long-lived assets to be disposed of . long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable . recoverability of these assets is measured by comparison of its carrying amount to future undiscounted cash flows the assets are expected to generate . if property , plant , and equipment and certain identifiable intangibles are considered to be impaired , the impairment to be recognized equals the amount by which the carrying value of the assets exceeds its fair market value . for the three fiscal years ended september 30 , 2006 , the company had no material impairment of its long-lived assets , except for the impairment of certain assets in connection with the restructuring actions described in note 6 of these notes to consolidated financial statements . sfas no . 142 , goodwill and other intangible assets requires that goodwill and intangible assets with indefinite useful lives should not be amortized but rather be tested for impairment at least annually or sooner whenever events or changes in circumstances indicate that they may be impaired . the company performs its goodwill impairment tests on or about august 30 of each year . the company did not recognize any goodwill or intangible asset impairment charges in 2006 , 2005 , or 2004 . the company established reporting units based on its current reporting structure . for purposes of testing goodwill for impairment , goodwill has been allocated to these reporting units to the extent it relates to each reporting sfas no . 142 also requires that intangible assets with definite lives be amortized over their estimated useful lives and reviewed for impairment in accordance with sfas no . 144 . the company is currently amortizing its acquired intangible assets with definite lives over periods ranging from 3 to 10 years . foreign currency translation the company translates the assets and liabilities of its international non-u.s . functional currency subsidiaries into u.s . dollars using exchange rates in effect at the end of each period . revenue and expenses for these subsidiaries are translated using rates that approximate those in effect during the period . gains and losses from these translations are credited or charged to foreign currency translation .
table: Asset retirement liability as of September 25, 2004 $8.2
table: Additional asset retirement obligations recognized 2.8
table: Accretion recognized 0.7
table: Asset retirement liability as of September 24, 2005 $11.7
table: Additional asset retirement obligations recognized 2.5
table: Accretion recognized 0.5
table: Asset retirement liability as of September 30, 2006 $14.7
question: Analyse this data from a financial earnings document. by how much did asset retirement liability increase from 2005 to 2006?