Year	constant 2015 US$
2000	7717630012.708257
2001	8237554437.849744
2002	8434053481.2434845
2003	8897355078.79591
2004	9078448737.50228
2005	9442185363.05246
2006	9616847931.377005
2007	10190238103.374659
2008	12343484092.125471
2009	13716054172.980825
2010	15293074463.520178
2011	16724021305.705095
2012	17514606939.23436
2013	18958708284.473007
2014	19183153338.798676
2015	19619707446.80851
2016	19522188730.836845
2017	20309968070.381317
2018	20614392503.273674
2019	20593228369.471672
2020	19803686326.518
2021	22806906437.573612