kimco realty corporation and subsidiaries notes to consolidated financial statements , continued investment in retail store leases 2014 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 , 2010 , 2009 and 2008 , was approximately $ 1.6 million , $ 0.8 million and $ 2.7 million , respectively . these amounts represent sublease revenues during the years ended december 31 , 2010 , 2009 and 2008 , of approximately $ 5.9 million , $ 5.2 million and $ 7.1 million , respectively , less related expenses of $ 4.3 million , $ 4.4 million and $ 4.4 million , respectively . 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 ) : 2011 , $ 5.2 and $ 3.4 ; 2012 , $ 4.1 and $ 2.6 ; 2013 , $ 3.8 and $ 2.3 ; 2014 , $ 2.9 and $ 1.7 ; 2015 , $ 2.1 and $ 1.3 , and thereafter , $ 2.8 and $ 1.6 , respectively . leveraged lease 2014 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 the fasb 2019s lease guidance . as of december 31 , 2010 , 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 and the remaining 12 properties were encumbered by third-party non-recourse debt of approximately $ 33.4 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 , 2010 and 2009 , the company 2019s net investment in the leveraged lease consisted of the following ( in millions ) : .

2010: remaining net rentals: 37.6
estimated unguaranteed residual value: 31.7
non-recourse mortgage debt: -30.1
unearned and deferred income: -34.2
net investment in leveraged lease: 5
2009: remaining net rentals: 44.1
estimated unguaranteed residual value: 31.7
non-recourse mortgage debt: -34.5
unearned and deferred income: -37
net investment in leveraged lease: 4.3

10 . variable interest entities : consolidated operating properties 2014 included within the company 2019s consolidated operating properties at december 31 , 2010 are four consolidated entities that are vies and for which the company is the primary beneficiary . all of these entities have been established to own and operate real estate property . the company 2019s involvement with these entities is through its majority ownership of the properties . these entities were deemed vies primarily based on the fact that the voting rights of the equity investors are not proportional to their obligation to absorb expected losses or receive the expected residual returns of the entity and substantially all of the entity 2019s activities are conducted on behalf of the investor which has disproportionately fewer voting rights . the company determined that it was the primary beneficiary of these vies as a result of its controlling financial interest . during 2010 , the company sold two consolidated vie 2019s which the company was the primary beneficiary. .

Questions:
what was sublease revenue in 2010?
what was it in 2009?
what is the sum?
what is the total sum including 2008?

Answers:
5.9
5.2
11.1
18.2