Year	current US$
2000	726.94942008
2001	752.22604198
2002	845.59293354
2003	1166.75638366
2004	1372.95979508
2005	1474.27146514
2006	1616.59022776
2007	1884.41838662
2008	2194.99231545
2009	2205.41087634
2010	2076.74189951
2011	2137.5889878
2012	1867.76240741
2013	1867.09133525
2014	1882.70597435
2015	1675.27145689
2016	1700.52688467
2017	1780.10924724
2018	1925.1174288
2019	1916.67049427
2020	2120.47660236
2021	2315.90041669