american tower corporation and subsidiaries notes to consolidated financial statements 2014 ( continued ) of certain of its assets and liabilities under its interest rate swap agreements held as of december 31 , 2006 and entered into during the first half of 2007 .
in addition , the company paid $ 8.0 million related to a treasury rate lock agreement entered into and settled during the year ended december 31 , 2008 .
the cost of the treasury rate lock is being recognized as additional interest expense over the 10-year term of the 7.00% ( 7.00 % ) notes .
during the year ended december 31 , 2007 , the company also received $ 3.1 million in cash upon settlement of the assets and liabilities under ten forward starting interest rate swap agreements with an aggregate notional amount of $ 1.4 billion , which were designated as cash flow hedges to manage exposure to variability in cash flows relating to forecasted interest payments in connection with the certificates issued in the securitization in may 2007 .
the settlement is being recognized as a reduction in interest expense over the five-year period for which the interest rate swaps were designated as hedges .
the company also received $ 17.0 million in cash upon settlement of the assets and liabilities under thirteen additional interest rate swap agreements with an aggregate notional amount of $ 850.0 million that managed exposure to variability of interest rates under the credit facilities but were not considered cash flow hedges for accounting purposes .
this gain is included in other income in the accompanying consolidated statement of operations for the year ended december 31 , 2007 .
as of december 31 , 2008 and 2007 , other comprehensive ( loss ) income included the following items related to derivative financial instruments ( in thousands ) : .

2008
2007
Deferred loss on the settlement of the treasury rate lock, net of tax
$(4,332)
$(4,901)
Deferred gain on the settlement of interest rate swap agreements entered into in connection with the Securitization, net oftax
1,238
1,636
Unrealized losses related to interest rate swap agreements, net of tax
(16,349)
(486)

during the years ended december 31 , 2008 and 2007 , the company recorded an aggregate net unrealized loss of approximately $ 15.8 million and $ 3.2 million , respectively ( net of a tax provision of approximately $ 10.2 million and $ 2.0 million , respectively ) in other comprehensive loss for the change in fair value of interest rate swaps designated as cash flow hedges and reclassified an aggregate of $ 0.1 million and $ 6.2 million , respectively ( net of an income tax provision of $ 2.0 million and an income tax benefit of $ 3.3 million , respectively ) into results of operations .
9 .
fair valuemeasurements the company determines the fair market values of its financial instruments based on the fair value hierarchy established in sfas no .
157 , which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value .
the standard describes three levels of inputs that may be used to measure fair value .
level 1 quoted prices in active markets for identical assets or liabilities that the company has the ability to access at the measurement date .
the company 2019s level 1 assets consist of available-for-sale securities traded on active markets as well as certain brazilian treasury securities that are highly liquid and are actively traded in over-the-counter markets .
level 2 observable inputs other than level 1 prices , such as quoted prices for similar assets or liabilities ; quoted prices in markets that are not active ; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. .

Question: Analyse this data from a financial earnings document. what was the change in the unrealized losses related to interest rate swap agreements net of tax from 2007 to 2008
Choices:
-16835
-15863
-15863.0
7945614
15863
Correct choice index: 2