Financial report context:
the following table presents the estimated future amortization of deferred stock compensation reported in both cost of revenue and operating expenses : fiscal year ( in thousands ) .

Financial table:
fiscal year: 2004; ( in thousands ): $ 3677
fiscal year: 2005; ( in thousands ): 2403
fiscal year: 2006; ( in thousands ): 840
fiscal year: 2007; ( in thousands ): 250
fiscal year: total estimated future amortization of deferred stock compensation; ( in thousands ): $ 7170

Additional report context:
impairment of intangible assets . in fiscal 2002 , we recognized an aggregate impairment charge of $ 3.8 million to reduce the amount of certain intangible assets associated with prior acquisitions to their estimated fair value . approximately $ 3.7 million and $ 0.1 million are included in integration expense and amortization of intangible assets , respectively , on the consolidated statement of operations . the impairment charge is primarily attributable to certain technology acquired from and goodwill related to the acquisition of stanza , inc . ( stanza ) in 1999 . during fiscal 2002 , we determined that we would not allocate future resources to assist in the market growth of this technology as products acquired in the merger with avant! provided customers with superior capabilities . as a result , we do not anticipate any future sales of the stanza product . in fiscal 2001 , we recognized an aggregate impairment charge of $ 2.2 million to reduce the amount of certain intangible assets associated with prior acquisitions to their estimated fair value . approximately $ 1.8 million and $ 0.4 million are included in cost of revenues and amortization of intangible assets , respectively , on the consolidated statement of operations . the impairment charge is attributable to certain technology acquired from and goodwill related to the acquisition of eagle design automation , inc . ( eagle ) in 1997 . during fiscal 2001 , we determined that we would not allocate future resources to assist in the market growth of this technology . as a result , we do not anticipate any future sales of the eagle product . there were no impairment charges during fiscal 2003 . other ( expense ) income , net . other income , net was $ 24.1 million in fiscal 2003 and consisted primarily of ( i ) realized gain on investments of $ 20.7 million ; ( ii ) rental income of $ 6.3 million ; ( iii ) interest income of $ 5.2 million ; ( iv ) impairment charges related to certain assets in our venture portfolio of ( $ 4.5 ) million ; ( vii ) foundation contributions of ( $ 2.1 ) million ; and ( viii ) interest expense of ( $ 1.6 ) million . other ( expense ) , net of other income was ( $ 208.6 ) million in fiscal 2002 and consisted primarily of ( i ) ( $ 240.8 ) million expense due to the settlement of the cadence design systems , inc . ( cadence ) litigation ; ( ii ) ( $ 11.3 ) million in impairment charges related to certain assets in our venture portfolio ; ( iii ) realized gains on investments of $ 22.7 million ; ( iv ) a gain of $ 3.1 million for the termination fee on the ikos systems , inc . ( ikos ) merger agreement ; ( v ) rental income of $ 10.0 million ; ( vi ) interest income of $ 8.3 million ; and ( vii ) and other miscellaneous expenses including amortization of premium forwards and foreign exchange gains and losses recognized during the fiscal year of ( $ 0.6 ) million . other income , net was $ 83.8 million in fiscal 2001 and consisted primarily of ( i ) a gain of $ 10.6 million on the sale of our silicon libraries business to artisan components , inc. ; ( ii ) ( $ 5.8 ) million in impairment charges related to certain assets in our venture portfolio ; ( iii ) realized gains on investments of $ 55.3 million ; ( iv ) rental income of $ 8.6 million ; ( v ) interest income of $ 12.8 million ; and ( vi ) other miscellaneous income including amortization of premium forwards and foreign exchange gains and losses recognized during the fiscal year of $ 2.3 million . termination of agreement to acquire ikos systems , inc . on july 2 , 2001 , we entered into an agreement and plan of merger and reorganization ( the ikos merger agreement ) with ikos systems , inc . the ikos merger agreement provided for the acquisition of all outstanding shares of ikos common stock by synopsys. .

Question: considering the years 2004-2005 , what is the percentual decrease observed in the estimated future amortization of deferred stock compensation?
Answer: -34.65%