management anticipates that the effective tax rate in 2017 will be between 32% ( 32 % ) and 35% ( 35 % ) . however , business portfolio actions , changes in the current economic environment , tax legislation or rate changes , currency fluctuations , ability to realize deferred tax assets , movements in stock price impacting tax benefits or deficiencies on stock-based payment awards , and the results of operations in certain taxing jurisdictions may cause this estimated rate to fluctuate . segment information arconic 2019s operations consist of three worldwide reportable segments : global rolled products , engineered products and solutions , and transportation and construction solutions ( see below ) . segment performance under arconic 2019s management reporting system is evaluated based on a number of factors ; however , the primary measure of performance is the after-tax operating income ( atoi ) of each segment . certain items such as the impact of lifo inventory accounting ; metal price lag ( the timing difference created when the average price of metal sold differs from the average cost of the metal when purchased by the respective segment 2014generally when the price of metal increases , metal lag is favorable and when the price of metal decreases , metal lag is unfavorable ) ; interest expense ; noncontrolling interests ; corporate expense ( general administrative and selling expenses of operating the corporate headquarters and other global administrative facilities , along with depreciation and amortization on corporate-owned assets ) ; restructuring and other charges ; and other items , including intersegment profit eliminations , differences between tax rates applicable to the segments and the consolidated effective tax rate , and other nonoperating items such as foreign currency transaction gains/losses and interest income are excluded from segment atoi . atoi for all reportable segments totaled $ 1087 in 2016 , $ 986 in 2015 , and $ 983 in 2014 . the following information provides shipment , sales and atoi data for each reportable segment , as well as certain realized price data , for each of the three years in the period ended december 31 , 2016 . see note o to the consolidated financial statements in part ii item 8 of this form 10-k for additional information . beginning in the first quarter of 2017 , arconic 2019s segment reporting metric will change from atoi to adjusted ebitda . global rolled products ( 1 ) .
what is the percentage of the global rolled products' atoi concerning the total atoi in 2016?
( 1 ) excludes the warrick , in rolling operations and the equity interest in the rolling mill at the joint venture in saudi arabia , both of which were previously part of the global rolled products segment but became part of alcoa corporation effective november 1 , 2016 . ( 2 ) generally , average realized price per metric ton of aluminum includes two elements : a ) the price of metal ( the underlying base metal component based on quoted prices from the lme , plus a regional premium which represents the incremental price over the base lme component that is associated with physical delivery of metal to a particular region ) , and b ) the conversion price , which represents the incremental price over the metal price component that is associated with converting primary aluminum into sheet and plate . in this circumstance , the metal price component is a pass-through to this segment 2019s customers with limited exception ( e.g. , fixed-priced contracts , certain regional premiums ) . the global rolled products segment produces aluminum sheet and plate for a variety of end markets . sheet and plate is sold directly to customers and through distributors related to the aerospace , automotive , commercial transportation , packaging , building and construction , and industrial products ( mainly used in the production of machinery and equipment and consumer durables ) end markets . a small portion of this segment also produces aseptic foil for the packaging end market . while the customer base for flat-rolled products is large , a significant amount of sales of sheet .