Year	constant 2015 US$
2001	14136405167.670622
2002	14080986792.021233
2003	14635983683.01612
2004	15295043745.468683
2005	15918794674.09032
2006	16529751060.553299
2007	17135941049.836096
2008	18171269077.474743
2009	19034104053.680073
2010	19874771318.177372
2011	20502435543.185486
2012	21505258630.315857
2013	22254955499.799717
2014	23777051762.484715
2015	24704984111.051323
2016	24781887283.309845
2017	26947255591.180225
2018	28897864145.869804
2019	30944704536.702896
2020	30242805558.159767
2021	31513080679.84699
2022	33305075646.928913
2023	34155936311.228172