Year current US$ 2006 11647736290.9874 2007 13892608025.1323 2008 11122854350.4144 2009 14769209158.6518 2010 12714642389.8259 2011 14877188594.9094 2012 13584827520.8867 2013 14802872149.0996 2014 11371865035.0611 2015 10727087162.9245 2016 10059613704.3868 2017 11099323877.6327 2018 12032947477.7995 2019 13496363418.2204 2020 14419194291.4959 2021 16431439704.8676 2022 18438006335.8544 2023 24920546115.0616