table of contents certain union-represented american mainline employees are covered by agreements that are not currently amendable . until those agreements become amendable , negotiations for jcbas will be conducted outside the traditional rla bargaining process described above , and , in the meantime , no self-help will be permissible . the piedmont mechanics and stock clerks and the psa dispatchers have agreements that are now amendable and are engaged in traditional rla negotiations . none of the unions representing our employees presently may lawfully engage in concerted refusals to work , such as strikes , slow-downs , sick-outs or other similar activity , against us . nonetheless , there is a risk that disgruntled employees , either with or without union involvement , could engage in one or more concerted refusals to work that could individually or collectively harm the operation of our airline and impair our financial performance . for more discussion , see part i , item 1a . risk factors 2013 201cunion disputes , employee strikes and other labor-related disruptions may adversely affect our operations . 201d aircraft fuel our operations and financial results are significantly affected by the availability and price of jet fuel . based on our 2016 forecasted mainline and regional fuel consumption , we estimate that , as of december 31 , 2015 , a one cent per gallon increase in aviation fuel price would increase our 2016 annual fuel expense by $ 44 million . the following table shows annual aircraft fuel consumption and costs , including taxes , for our mainline operations for 2015 and 2014 ( gallons and aircraft fuel expense in millions ) . year gallons average price per gallon aircraft fuel expense percent of total mainline operating expenses .
in 2016 what is the anticipated percentage increase in the aircraft fuel expense
total fuel expenses for our wholly-owned and third-party regional carriers operating under capacity purchase agreements of american were $ 1.2 billion and $ 2.0 billion for the years ended december 31 , 2015 and 2014 , respectively . as of december 31 , 2015 , we did not have any fuel hedging contracts outstanding to hedge our fuel consumption . as such , and assuming we do not enter into any future transactions to hedge our fuel consumption , we will continue to be fully exposed to fluctuations in fuel prices . our current policy is not to enter into transactions to hedge our fuel consumption , although we review that policy from time to time based on market conditions and other factors . fuel prices have fluctuated substantially over the past several years . we cannot predict the future availability , price volatility or cost of aircraft fuel . natural disasters , political disruptions or wars involving oil-producing countries , changes in fuel-related governmental policy , the strength of the u.s . dollar against foreign currencies , changes in access to petroleum product pipelines and terminals , speculation in the energy futures markets , changes in aircraft fuel production capacity , environmental concerns and other unpredictable events may result in fuel supply shortages , additional fuel price volatility and cost increases in the future . see part i , item 1a . risk factors 2013 201cour business is dependent on the price and availability of aircraft fuel . continued periods of high volatility in fuel costs , increased fuel prices and significant disruptions in the supply of aircraft fuel could have a significant negative impact on our operating results and liquidity . 201d insurance we maintain insurance of the types that we believe are customary in the airline industry , including insurance for public liability , passenger liability , property damage , and all-risk coverage for damage to our aircraft . principal coverage includes liability for injury to members of the public , including passengers , damage to .