Year	constant 2015 US$
2000	32212.0291535211
2001	42121.70728654967
2002	32065.364054521713
2003	39592.25378161093
2004	32394.462438125644
2005	31580.751577912015
2006	32300.678051527113
2007	39399.17176654563
2008	25116.742402449796
2009	24090.51694166951
2010	26027.02663205556
2011	26383.423428019538
2012	25180.252895186
2013	26474.212699780586
2014	25221.030226594572
2015	23599.053594210647
2016	23417.5390690652
2017	22291.32091206933
2018	21925.73929958096
2019	22079.722889110708
2020	24410.93917334656
2021	23987.99029318391
2022	21178.252836136675