Year	current US$
2000	339.85016216
2001	369.70792796
2002	462.1800757
2003	628.69580412
2004	737.58077104
2005	757.96518609
2006	788.11707458
2007	889.75287044
2008	984.66896507
2009	889.61785644
2010	796.90679893
2011	797.82254715
2012	706.25112714
2013	692.24997861
2014	711.17448882
2015	603.30130484
2016	731.5952837
2017	719.54402356
2018	764.69874276
2019	801.88962709
2020	768.48480554
2021	750.41705414