american tower corporation and subsidiaries notes to consolidated financial statements 2014 ( continued ) the company has selected december 1 as the date to perform its annual impairment test . in performing its 2005 and 2004 testing , the company completed an internal appraisal and estimated the fair value of the rental and management reporting unit that contains goodwill utilizing future discounted cash flows and market information . based on the appraisals performed , the company determined that goodwill in its rental and management segment was not impaired . the company 2019s other intangible assets subject to amortization consist of the following as of december 31 , ( in thousands ) : .

Table:
 | 2005 | 2004
acquired customer base and network location intangibles | $ 2606546 | $ 1369607
deferred financing costs | 65623 | 89736
acquired licenses and other intangibles | 51703 | 43404
total | 2723872 | 1502747
less accumulated amortization | -646560 ( 646560 ) | -517444 ( 517444 )
other intangible assets net | $ 2077312 | $ 985303
the company amortizes its intangible assets over periods ranging from three to fifteen years .
amortization of intangible assets for the years ended december 31 , 2005 and 2004 aggregated approximately $ 136.0 million and $ 97.8 million , respectively ( excluding amortization of deferred financing costs , which is included in interest expense ) .
the company expects to record amortization expense of approximately $ 183.6 million , $ 178.3 million , $ 174.4 million , $ 172.7 million and $ 170.3 million , for the years ended december 31 , 2006 , 2007 , 2008 , 2009 and 2010 , respectively .
these amounts are subject to changes in estimates until the preliminary allocation of the spectrasite purchase price is finalized .
6 .
notes receivable in 2000 , the company loaned tv azteca , s.a .
de c.v .
( tv azteca ) , the owner of a major national television network in mexico , $ 119.8 million .
the loan , which initially bore interest at 12.87% ( 12.87 % ) , payable quarterly , was discounted by the company , as the fair value interest rate at the date of the loan was determined to be 14.25% ( 14.25 % ) .
the loan was amended effective january 1 , 2003 to increase the original interest rate to 13.11% ( 13.11 % ) .
as of december 31 , 2005 and 2004 , approximately $ 119.8 million undiscounted ( $ 108.2 million discounted ) under the loan was outstanding and included in notes receivable and other long-term assets in the accompanying consolidated balance sheets .
the term of the loan is seventy years ; however , the loan may be prepaid by tv azteca without penalty during the last fifty years of the agreement .
the discount on the loan is being amortized to interest income 2014tv azteca , net , using the effective interest method over the seventy-year term of the loan .
simultaneous with the signing of the loan agreement , the company also entered into a seventy year economic rights agreement with tv azteca regarding space not used by tv azteca on approximately 190 of its broadcast towers .
in exchange for the issuance of the below market interest rate loan discussed above and the annual payment of $ 1.5 million to tv azteca ( under the economic rights agreement ) , the company has the right to market and lease the unused tower space on the broadcast towers ( the economic rights ) .
tv azteca retains title to these towers and is responsible for their operation and maintenance .
the company is entitled to 100% ( 100 % ) of the revenues generated from leases with tenants on the unused space and is responsible for any incremental operating expenses associated with those tenants. .

Question: what was the percent of the gradual decline in the recorded amortization expense from 2006 to 2007
Answer: 2.97%
Calculation: subtract(183.6, 178.3), divide(#0, 178.3)