Year	current US$
1999	242646025952.13034
2000	231860171977.0393
2001	227830016490.51324
2002	243867666898.48886
2003	290635753966.2447
2004	324427256928.3365
2005	347968473183.1623
2006	363394408249.9297
2007	423111156756.3251
2008	477340665572.9354
2009	421427556378.81396
2010	434292747715.96735
2011	490846701264.9677
2012	493487040108.1503
2013	538719833500.1124
2014	552065828491.9362
2015	452529654501.4065
2016	448970238541.50073
2017	503747289464.8577
2018	545834313437.5123
2019	547492928570.9081