Year	constant 2015 US$
1990	29461457688.065884
1991	29107921484.00154
1992	26313560646.119514
1993	24313729537.28221
1994	21390435799.965015
1995	19177382279.43242
1996	19747850195.709496
1997	21944100459.056778
1998	23784534712.753696
1999	24706762920.522923
2000	26050713510.578705
2001	27290410626.934006
2002	28695606884.790695
2003	30794422402.65512
2004	34264012500.204945
2005	37561426957.17975
2006	41153181537.01547
2007	44464790608.887375
2008	48805110549.73654
2009	48548267290.01621
2010	52398297696.5982
2011	55606056092.143745
2012	55880011073.27525
2013	55703404920.93116
2014	56959099294.91209
2015	54061945285.66199
2016	52504461350.137436
2017	54347910375.224
2018	56112036764.48584
2019	57294424801.1735
2020	56225236055.29526
2021	57768977004.67399
2022	54896096184.2338
2023	57270019881.547554