Year	constant 2015 US$
2008	4786205342.100717
2009	5069106060.220953
2010	5252592011.553335
2011	5423802247.195187
2012	5597938571.305773
2013	5826935802.709548
2014	6143806343.734993
2015	6213068736.574888
2016	6351987564.886125
2017	6531886054.235034
2018	6839101005.524855
2019	7264541365.914161
2020	7441381002.757402
2021	8003314253.832523
2022	8244121979.935538
2023	8580837598.143244