Year	current US$
2000	103.49640314291513
2001	105.40741579163368
2002	116.24738906949486
2003	131.46651223351324
2004	153.0781794954847
2005	166.02953374586698
2006	173.1896037916485
2007	204.0455253458013
2008	240.96819793143493
2009	226.01181361970677
2010	215.75552351032619
2011	223.75978183995542
2012	215.59778230158727
2013	231.69626141700962
2014	247.82274959103515
2015	222.4471490511103
2016	233.05529242734534
2017	257.9487677626441
2018	273.0931621576547
2019	255.17827731477252
2020	218.37549026719967
2021	191.6310969916957