Year	current US$
1999	3397729214.3502235
2000	3558686423.156737
2001	4739984464.939795
2002	5368672182.7667265
2003	5891338552.6644335
2004	6758741947.749534
2005	7265786371.223834
2006	7592053460.658739
2007	8511582799.845293
2008	10496447970.667112
2009	9941991468.189432
2010	10650581844.162764
2011	12170191449.071808
2012	13880409849.018843
2013	15041994042.969244
2014	14874666440.768322
2015	12782428074.094446
2016	12070933648.085722
2017	12503282667.353271
2018	12252256106.397158
2019	12715959418.65428
2020	10934003697.83746
2021	10826775967.612486
2022	11454306745.714064
2023	12888930335.448515