Year	constant 2015 US$
1993	6738616555.59492
1994	6863667534.471482
1995	7389280404.685935
1996	7831821825.753512
1997	8568028009.198824
1998	8893300574.804684
1999	8944104060.553513
2000	9313225685.109764
2001	9849370051.682028
2002	10636948900.989058
2003	11515569940.049215
2004	12292369871.623823
2005	13289108543.507027
2006	14745466258.870308
2007	15910814276.203117
2008	15527069271.74843
2009	13791544798.949213
2010	13638997871.617182
2011	14032451113.864836
2012	14600232131.000383
2013	15104811965.347258
2014	15560293635.258194
2015	16246019201.20585
2016	16883657368.960928
2017	17272896681.249992
2018	17928299259.89687
2019	18691201433.00351
2020	18671752781.543747
2021	20078003785.25351
2022	20362979952.18476
2023	20226406681.939056