Year	current US$
2000	105.491876853545
2001	107.37274602559678
2002	96.0781945248422
2003	100.59388474560993
2004	111.1511578206433
2005	135.21663019296759
2006	152.3773076062018
2007	173.40331876742974
2008	185.54078121811457
2009	175.4234925666221
2010	196.45571208993974
2011	217.9186532302983
2012	218.27570202785725
2013	219.6774971617
2014	219.93268541265564
2015	183.3175045150115
2016	173.36940747569693
2017	188.00417459615306
2018	184.79972437721875
2019	180.48958307451542
2020	150.45834562625626
2021	173.3355546071105