kimco realty corporation and subsidiaries notes to consolidated financial statements , continued investment in retail store leases the company has interests in various retail store leases relating to the anchor store premises in neighborhood and community shopping centers . these premises have been sublet to retailers who lease the stores pursuant to net lease agreements . income from the investment in these retail store leases during the years ended december 31 , 2008 , 2007 and 2006 , was approximately $ 2.7 million , $ 1.2 million and $ 1.3 million , respectively . these amounts represent sublease revenues during the years ended december 31 , 2008 , 2007 and 2006 , of approximately $ 7.1 million , $ 7.7 million and $ 8.2 million , respectively , less related expenses of $ 4.4 million , $ 5.1 million and $ 5.7 million , respectively , and an amount which , in management 2019s estimate , reasonably provides for the recovery of the investment over a period representing the expected remaining term of the retail store leases . the company 2019s future minimum revenues under the terms of all non-cancelable tenant subleases and future minimum obligations through the remaining terms of its retail store leases , assuming no new or renegotiated leases are executed for such premises , for future years are as follows ( in millions ) : 2009 , $ 5.6 and $ 3.8 ; 2010 , $ 5.4 and $ 3.7 ; 2011 , $ 4.5 and $ 3.1 ; 2012 , $ 2.3 and $ 2.1 ; 2013 , $ 1.0 and $ 1.3 and thereafter , $ 1.4 and $ 0.5 , respectively . leveraged lease during june 2002 , the company acquired a 90% ( 90 % ) equity participation interest in an existing leveraged lease of 30 properties . the properties are leased under a long-term bond-type net lease whose primary term expires in 2016 , with the lessee having certain renewal option rights . the company 2019s cash equity investment was approximately $ 4.0 million . this equity investment is reported as a net investment in leveraged lease in accordance with sfas no . 13 , accounting for leases ( as amended ) . from 2002 to 2007 , 18 of these properties were sold , whereby the proceeds from the sales were used to pay down the mortgage debt by approximately $ 31.2 million . as of december 31 , 2008 , the remaining 12 properties were encumbered by third-party non-recourse debt of approximately $ 42.8 million that is scheduled to fully amortize during the primary term of the lease from a portion of the periodic net rents receivable under the net lease . as an equity participant in the leveraged lease , the company has no recourse obligation for principal or interest payments on the debt , which is collateralized by a first mortgage lien on the properties and collateral assignment of the lease . accordingly , this obligation has been offset against the related net rental receivable under the lease . at december 31 , 2008 and 2007 , the company 2019s net investment in the leveraged lease consisted of the following ( in millions ) : .

2008: remaining net rentals: 53.8
estimated unguaranteed residual value: 31.7
non-recourse mortgage debt: -38.5
unearned and deferred income: -43
net investment in leveraged lease: 4
2007: remaining net rentals: 55
estimated unguaranteed residual value: 36
non-recourse mortgage debt: -43.9
unearned and deferred income: -43.3
net investment in leveraged lease: 3.8

9 . mortgages and other financing receivables : the company has various mortgages and other financing receivables which consist of loans acquired and loans originated by the company . for a complete listing of the company 2019s mortgages and other financing receivables at december 31 , 2008 , see financial statement schedule iv included on page 141 of this annual report on form 10-k . reconciliation of mortgage loans and other financing receivables on real estate: .

Questions:
what is the sum of the company 2019s future minimum revenues under the terms of all non-cancelable tenant subleases for 2009 and 2010?
what is the total sum including 2011?

Answers:
11
15.5