american tower corporation and subsidiaries notes to consolidated financial statements 2014 ( continued ) the following table illustrates the effect on net loss and net loss per share if the company had applied the fair value recognition provisions of sfas no . 123 to stock-based compensation . the estimated fair value of each option is calculated using the black-scholes option-pricing model ( in thousands , except per share amounts ) : .
what is the percentage change in 401 ( k ) contributions from 2001 to 2002?
fair value of financial instruments 2014as of december 31 , 2002 , the carrying amounts of the company 2019s 5.0% ( 5.0 % ) convertible notes , the 2.25% ( 2.25 % ) convertible notes , the 6.25% ( 6.25 % ) convertible notes and the senior notes were approximately $ 450.0 million , $ 210.9 million , $ 212.7 million and $ 1.0 billion , respectively , and the fair values of such notes were $ 291.4 million , $ 187.2 million , $ 144.4 million and $ 780.0 million , respectively . as of december 31 , 2001 , the carrying amount of the company 2019s 5.0% ( 5.0 % ) convertible notes , the 2.25% ( 2.25 % ) convertible notes , the 6.25% ( 6.25 % ) convertible notes and the senior notes were approximately $ 450.0 million , $ 204.1 million , $ 212.8 million and $ 1.0 billion , respectively , and the fair values of such notes were $ 268.3 million , $ 173.1 million , $ 158.2 million and $ 805.0 million , respectively . fair values were determined based on quoted market prices . the carrying values of all other financial instruments reasonably approximate the related fair values as of december 31 , 2002 and 2001 . retirement plan 2014the company has a 401 ( k ) plan covering substantially all employees who meet certain age and employment requirements . under the plan , the company matches 35% ( 35 % ) of participants 2019 contributions up to a maximum 5% ( 5 % ) of a participant 2019s compensation . the company contributed approximately $ 979000 , $ 1540000 and $ 1593000 to the plan for the years ended december 31 , 2002 , 2001 and 2000 , respectively . recent accounting pronouncements 2014in june 2001 , the fasb issued sfas no . 143 , 201caccounting for asset retirement obligations . 201d this statement establishes accounting standards for the recognition and measurement of liabilities associated with the retirement of tangible long-lived assets and the related asset retirement costs . the requirements of sfas no . 143 are effective for the company as of january 1 , 2003 . the company will adopt this statement in the first quarter of 2003 and does not expect the impact of adopting this statement to have a material impact on its consolidated financial position or results of operations . in august 2001 , the fasb issued sfas no . 144 , 201caccounting for the impairment or disposal of long-lived assets . 201d sfas no . 144 supersedes sfas no . 121 , 201caccounting for the impairment of long-lived assets and for long-lived assets to be disposed of , 201d but retains many of its fundamental provisions . sfas no . 144 also clarifies certain measurement and classification issues from sfas no . 121 . in addition , sfas no . 144 supersedes the accounting and reporting provisions for the disposal of a business segment as found in apb no . 30 , 201creporting the results of operations 2014reporting the effects of disposal of a segment of a business and extraordinary , unusual and infrequently occurring events and transactions 201d . however , sfas no . 144 retains the requirement in apb no . 30 to separately report discontinued operations , and broadens the scope of such requirement to include more types of disposal transactions . the scope of sfas no . 144 excludes goodwill and other intangible assets that are not to be amortized , as the accounting for such items is prescribed by sfas no . 142 . the company implemented sfas no . 144 on january 1 , 2002 . accordingly , all relevant impairment assessments and decisions concerning discontinued operations have been made under this standard in 2002. .