Year	constant 2015 US$
1995	17754103517.04297
1996	18980938519.748436
1997	20887527690.02422
1998	22478594693.97695
1999	22338644066.492184
2000	22821712664.91562
2001	24035398830.354294
2002	25756859117.75195
2003	28492289921.737103
2004	31863782275.65976
2005	34568472915.49726
2006	37507059967.80741
2007	42792367749.462494
2008	44153102096.34725
2009	33911225216.91327
2010	34827550832.53554
2011	36963561749.79608
2012	36931357028.6328
2013	37837944449.614044
2014	39222610989.54959
2015	41848660465.21248
2016	42656666556.34881
2017	43769047537.796074
2018	45241309010.93357
2019	45938777661.315605
2020	44313141564.22967
2021	47580491709.69959
2022	48595196723.82069
2023	47832154752.08983