Year	constant 2015 US$
2001	24478987.12871195
2002	24446953.0203293
2003	25246827.13917207
2004	26222328.817259584
2005	26635730.341816407
2006	28054250.65165884
2007	28800278.700209536
2008	30875008.93653457
2009	32830657.65108382
2010	33213946.87795596
2011	33111949.427967623
2012	34600645.303909995
2013	36937685.015132785
2014	37049032.133117974
2015	36750609.123448014
2016	36739384.80575192
2017	36646913.877505645
2018	33450388.54505411
2019	31099106.21221695
2020	31488880.076413516
2021	34372327.118841894
2022	31427193.490083728