Year	current US$
2000	107.53507160110736
2001	108.81039464812663
2002	97.68097968537718
2003	102.31233593916349
2004	113.54550211240344
2005	137.73535229951622
2006	154.8840886788017
2007	175.9212195339037
2008	188.36119753627926
2009	178.34709000839464
2010	200.22000703954532
2011	222.4267041561493
2012	223.58381918168058
2013	226.2534735005887
2014	226.56086284170564
2015	191.7778435308439
2016	183.10110178329788
2017	198.73862328419548
2018	190.94011566919434
2019	185.68891520220262
2020	156.6177400997253
2021	180.3682801755486