debt maturities 2013 the following table presents aggregate debt maturities as of december 31 , 2008 , excluding market value adjustments .millions of dollars .
[['2009', '$ 720'], ['2010', '465'], ['2011', '555'], ['2012', '746'], ['2013', '713'], ['thereafter', '5728'], ['total debt', '$ 8927']]
as of december 31 , 2008 , we have reclassified as long-term debt approximately $ 400 million of debt due within one year that we intend to refinance .this reclassification reflects our ability and intent to refinance any short-term borrowings and certain current maturities of long-term debt on a long-term basis .at december 31 , 2007 , we reclassified as long-term debt approximately $ 550 million of debt due within one year that we intended to refinance at that time .mortgaged properties 2013 equipment with a carrying value of approximately $ 2.7 billion and $ 2.8 billion at december 31 , 2008 and 2007 , respectively , serves as collateral for capital leases and other types of equipment obligations in accordance with the secured financing arrangements utilized to acquire such railroad equipment .as a result of the merger of missouri pacific railroad company ( mprr ) with and into uprr on january 1 , 1997 , and pursuant to the underlying indentures for the mprr mortgage bonds , uprr must maintain the same value of assets after the merger in order to comply with the security requirements of the mortgage bonds .as of the merger date , the value of the mprr assets that secured the mortgage bonds was approximately $ 6.0 billion .in accordance with the terms of the indentures , this collateral value must be maintained during the entire term of the mortgage bonds irrespective of the outstanding balance of such bonds .credit facilities 2013 on december 31 , 2008 , we had $ 1.9 billion of credit available under our revolving credit facility ( the facility ) .the facility is designated for general corporate purposes and supports the issuance of commercial paper .we did not draw on the facility during 2008 .commitment fees and interest rates payable under the facility are similar to fees and rates available to comparably rated , investment- grade borrowers .the facility allows borrowings at floating rates based on london interbank offered rates , plus a spread , depending upon our senior unsecured debt ratings .the facility requires union pacific corporation to maintain a debt-to-net-worth coverage ratio as a condition to making a borrowing .at december 31 , 2008 , and december 31 , 2007 ( and at all times during these periods ) , we were in compliance with this covenant .the definition of debt used for purposes of calculating the debt-to-net-worth coverage ratio includes , among other things , certain credit arrangements , capital leases , guarantees and unfunded and vested pension benefits under title iv of erisa .at december 31 , 2008 , the debt-to-net-worth coverage ratio allowed us to carry up to $ 30.9 billion of debt ( as defined in the facility ) , and we had $ 9.9 billion of debt ( as defined in the facility ) outstanding at that date .under our current capital plans , we expect to continue to satisfy the debt-to-net-worth coverage ratio ; however , many factors beyond our reasonable control ( including the risk factors in item 1a of this report ) could affect our ability to comply with this provision in the future .the facility does not include any other financial restrictions , credit rating triggers ( other than rating-dependent pricing ) , or any other provision that could require us to post collateral .the .

Question: what percentage of total aggregate debt maturities as of december 31 , 2008 are due after 2013?
Answer: 64%