pre_text: interest expense , net was $ 26.4 million , $ 14.6 million , and $ 5.3 million for the years ended december 31 , 2016 , 2015 and 2014 , respectively . interest expense includes the amortization of deferred financing costs , bank fees , capital and built-to-suit lease interest and interest expense under the credit and other long term debt facilities . amortization of deferred financing costs was $ 1.2 million , $ 0.8 million , and $ 0.6 million for the years ended december 31 , 2016 , 2015 and 2014 , respectively . the company monitors the financial health and stability of its lenders under the credit and other long term debt facilities , however during any period of significant instability in the credit markets lenders could be negatively impacted in their ability to perform under these facilities . 6 . commitments and contingencies obligations under operating leases the company leases warehouse space , office facilities , space for its brand and factory house stores and certain equipment under non-cancelable operating leases . the leases expire at various dates through 2033 , excluding extensions at the company 2019s option , and include provisions for rental adjustments . the table below includes executed lease agreements for brand and factory house stores that the company did not yet occupy as of december 31 , 2016 and does not include contingent rent the company may incur at its stores based on future sales above a specified minimum or payments made for maintenance , insurance and real estate taxes . the following is a schedule of future minimum lease payments for non-cancelable real property operating leases as of december 31 , 2016 as well as significant operating lease agreements entered into during the period after december 31 , 2016 through the date of this report : ( in thousands ) .
post_text: included in selling , general and administrative expense was rent expense of $ 109.0 million , $ 83.0 million and $ 59.0 million for the years ended december 31 , 2016 , 2015 and 2014 , respectively , under non-cancelable operating lease agreements . included in these amounts was contingent rent expense of $ 13.0 million , $ 11.0 million and $ 11.0 million for the years ended december 31 , 2016 , 2015 and 2014 , respectively . sports marketing and other commitments within the normal course of business , the company enters into contractual commitments in order to promote the company 2019s brand and products . these commitments include sponsorship agreements with teams and athletes on the collegiate and professional levels , official supplier agreements , athletic event sponsorships and other marketing commitments . the following is a schedule of the company 2019s future minimum payments under its sponsorship and other marketing agreements as of december 31 .
table: 2017 $114,857
table: 2018 127,504
table: 2019 136,040
table: 2020 133,092
table: 2021 122,753
table: 2022 and thereafter 788,180
table: Total future minimum lease payments $1,422,426
question: Analyse this data from a financial earnings document. what is the percentage change in interest expense from 2015 to 2016?