Year	current US$
2000	107.07021093
2001	108.63163043
2002	113.10735551
2003	147.20701541
2004	162.91485274
2005	148.88945117
2006	143.54485956
2007	168.10914725
2008	196.08949872
2009	168.40339687
2010	217.92911583
2011	255.23114738
2012	261.85706543
2013	267.4292623
2014	273.10413869
2015	242.72445527
2016	246.02803326
2017	336.34928976
2018	287.81510518
2019	292.07744021
2020	263.2539905
2021	349.75529727