Year current US$ 2008 1671.6336444485348 2009 1762.476114587598 2010 1900.5830636349547 2011 1905.7404710863973 2012 2128.568113678715 2013 2201.3790508082034 2014 2248.445466404923 2015 1981.7312445616126 2016 1801.7027531521271 2017 1674.7798312507557 2018 1732.6836431801628 2019 1832.2217804560066 2020 1716.0187988137445 2021 1796.5778046215567 2022 1848.7422239449822 2023 1827.8437074051437