Year	constant 2015 US$
1995	5085083975.899998
1996	6400693324.010153
1997	7932568924.760933
1998	8233459944.595308
1999	6682210029.748434
2000	7625481275.432419
2001	9461124862.942965
2002	11371285555.213667
2003	12403022701.718744
2004	13300999193.155853
2005	15940315114.451944
2006	17981832147.356632
2007	18556028368.025772
2008	20711797490.842567
2009	17879277651.850384
2010	20808213051.52499
2011	23835156162.880066
2012	26420681789.725765
2013	28341400606.66366
2014	27824828047.482018
2015	28498382257.019516
2016	29902546266.982018
2017	33945709987.06678
2018	36256038693.5992
2019	39905991045.24647
2020	39991625469.170685
2021	46807086887.5703
2022	52512365269.55897
2023	50771427483.36639