Financial report context:
intermodal 2013 decreased volumes and fuel surcharges reduced freight revenue from intermodal shipments in 2009 versus 2008 . volume from international traffic decreased 24% ( 24 % ) in 2009 compared to 2008 , reflecting economic conditions , continued weak imports from asia , and diversions to non-uprr served ports . additionally , continued weakness in the domestic housing and automotive sectors translated into weak demand in large sectors of the international intermodal market , which also contributed to the volume decline . conversely , domestic traffic increased 8% ( 8 % ) in 2009 compared to 2008 . a new contract with hub group , inc. , which included additional shipments , was executed in the second quarter of 2009 and more than offset the impact of weak market conditions in the second half of 2009 . price increases and fuel surcharges generated higher revenue in 2008 , partially offset by lower volume levels . international traffic declined 11% ( 11 % ) in 2008 , reflecting continued softening of imports from china and the loss of a customer contract . notably , the peak intermodal shipping season , which usually starts in the third quarter , was particularly weak in 2008 . additionally , continued weakness in domestic housing and automotive sectors translated into weak demand in large sectors of the international intermodal market , which also contributed to lower volumes . domestic traffic declined 3% ( 3 % ) in 2008 due to the loss of a customer contract and lower volumes from less-than-truckload shippers . additionally , the flood-related embargo on traffic in the midwest during the second quarter hindered intermodal volume levels in 2008 . mexico business 2013 each of our commodity groups include revenue from shipments to and from mexico . revenue from mexico business decreased 26% ( 26 % ) in 2009 versus 2008 to $ 1.2 billion . volume declined in five of our six commodity groups , down 19% ( 19 % ) in 2009 , driven by 32% ( 32 % ) and 24% ( 24 % ) reductions in industrial products and automotive shipments , respectively . conversely , energy shipments increased 9% ( 9 % ) in 2009 versus 2008 , partially offsetting these declines . revenue from mexico business increased 13% ( 13 % ) to $ 1.6 billion in 2008 compared to 2007 . price improvements and fuel surcharges contributed to these increases , partially offset by a 4% ( 4 % ) decline in volume in 2008 compared to 2007 . operating expenses millions of dollars 2009 2008 2007 % (  % ) change 2009 v 2008 % (  % ) change 2008 v 2007 .

Financial table:
millions of dollars: compensation and benefits; 2009: $ 4063; 2008: $ 4457; 2007: $ 4526; % (  % ) change 2009 v 2008: ( 9 ) % (  % ); % (  % ) change 2008 v 2007: ( 2 ) % (  % )
millions of dollars: fuel; 2009: 1763; 2008: 3983; 2007: 3104; % (  % ) change 2009 v 2008: -56 ( 56 ); % (  % ) change 2008 v 2007: 28
millions of dollars: purchased services and materials; 2009: 1614; 2008: 1902; 2007: 1856; % (  % ) change 2009 v 2008: -15 ( 15 ); % (  % ) change 2008 v 2007: 2
millions of dollars: depreciation; 2009: 1444; 2008: 1387; 2007: 1321; % (  % ) change 2009 v 2008: 4; % (  % ) change 2008 v 2007: 5
millions of dollars: equipment and other rents; 2009: 1180; 2008: 1326; 2007: 1368; % (  % ) change 2009 v 2008: -11 ( 11 ); % (  % ) change 2008 v 2007: -3 ( 3 )
millions of dollars: other; 2009: 687; 2008: 840; 2007: 733; % (  % ) change 2009 v 2008: -18 ( 18 ); % (  % ) change 2008 v 2007: 15
millions of dollars: total; 2009: $ 10751; 2008: $ 13895; 2007: $ 12908; % (  % ) change 2009 v 2008: ( 23 ) % (  % ); % (  % ) change 2008 v 2007: 8% ( 8 % )

Additional report context:
2009 intermodal revenue international domestic .

Question: what was the average yearly decline in international traffic in 2008 and in 2009?
Answer: 17.5%