Year	current US$
2000	181.14724731
2001	198.5879364
2002	213.95626831
2003	227.69859314
2004	232.50595093
2005	331.98812866
2006	387.44146729
2007	570.31433105
2008	610.09155273
2009	676.22460938
2010	608.96154785
2011	695.99157715
2012	601.42425537
2013	710.793396
2014	864.15557861
2015	985.41900635
2016	984.24865723
2017	980.09216309
2018	973.13745117
2019	1013.10137939
2020	1186.15649414