performance of the company 2019s obligations under the senior notes , including any repurchase obligations resulting from a change of control , is unconditionally guaranteed , jointly and severally , on an unsecured basis , by each of hii 2019s existing and future domestic restricted subsidiaries that guarantees debt under the credit facility ( the 201csubsidiary guarantors 201d ) . the guarantees rank equally with all other unsecured and unsubordinated indebtedness of the guarantors . the subsidiary guarantors are each directly or indirectly 100% ( 100 % ) owned by hii . there are no significant restrictions on the ability of hii or any subsidiary guarantor to obtain funds from their respective subsidiaries by dividend or loan . mississippi economic development revenue bonds 2014as of december 31 , 2011 and 2010 , the company had $ 83.7 million outstanding from the issuance of industrial revenue bonds issued by the mississippi business finance corporation . these bonds accrue interest at a fixed rate of 7.81% ( 7.81 % ) per annum ( payable semi-annually ) and mature in 2024 . while repayment of principal and interest is guaranteed by northrop grumman systems corporation , hii has agreed to indemnify northrop grumman systems corporation for any losses related to the guaranty . in accordance with the terms of the bonds , the proceeds have been used to finance the construction , reconstruction , and renovation of the company 2019s interest in certain ship manufacturing and repair facilities , or portions thereof , located in the state of mississippi . gulf opportunity zone industrial development revenue bonds 2014as of december 31 , 2011 and 2010 , the company had $ 21.6 million outstanding from the issuance of gulf opportunity zone industrial development revenue bonds ( 201cgo zone irbs 201d ) issued by the mississippi business finance corporation . the go zone irbs were initially issued in a principal amount of $ 200 million , and in november 2010 , in connection with the anticipated spin-off , hii purchased $ 178 million of the bonds using the proceeds from a $ 178 million intercompany loan from northrop grumman . see note 20 : related party transactions and former parent company equity . the remaining bonds accrue interest at a fixed rate of 4.55% ( 4.55 % ) per annum ( payable semi-annually ) , and mature in 2028 . in accordance with the terms of the bonds , the proceeds have been used to finance the construction , reconstruction , and renovation of the company 2019s interest in certain ship manufacturing and repair facilities , or portions thereof , located in the state of mississippi . the estimated fair value of the company 2019s total long-term debt , including current portions , at december 31 , 2011 and 2010 , was $ 1864 million and $ 128 million , respectively . the fair value of the total long-term debt was calculated based on recent trades for most of the company 2019s debt instruments or based on interest rates prevailing on debt with substantially similar risks , terms and maturities . the aggregate amounts of principal payments due on long-term debt for each of the next five years and thereafter are : ( $ in millions ) .
what is the ratio of the long-term debt after 2016 to the total long term debt
14 . investigations , claims , and litigation the company is involved in legal proceedings before various courts and administrative agencies , and is periodically subject to government examinations , inquiries and investigations . pursuant to fasb accounting standard codification 450 contingencies , the company has accrued for losses associated with investigations , claims and litigation when , and to the extent that , loss amounts related to the investigations , claims and litigation are probable and can be reasonably estimated . the actual losses that might be incurred to resolve such investigations , claims and litigation may be higher or lower than the amounts accrued . for matters where a material loss is probable or reasonably possible and the amount of loss cannot be reasonably estimated , but the company is able to reasonably estimate a range of possible losses , such estimated range is required to be disclosed in these notes . this estimated range would be based on information currently available to the company and would involve elements of judgment and significant uncertainties . this estimated range of possible loss would not represent the company 2019s maximum possible loss exposure . for matters as to which the company is not able to reasonably estimate a possible loss or range of loss , the company is required to indicate the reasons why it is unable to estimate the possible loss or range of loss . for matters not specifically described in these notes , the company does not believe , based on information currently available to it , that it is reasonably possible that the liabilities , if any , arising from .