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 ) .
[['fiscal year', '( in thousands )'], ['2004', '$ 3677'], ['2005', '2403'], ['2006', '840'], ['2007', '250'], ['total estimated future amortization of deferred stock compensation', '$ 7170']]
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%
Explanation: it is the variation between those values divided by the initial one , then turned into a percentage .