Year	current US$
1998	484.1191999105047
1999	391.2560401556027
2000	264.182665109964
2001	302.58345091223396
2002	483.4897287568674
2003	668.0707939504218
2004	775.2595803129678
2005	800.8851412574649
2006	977.1330924592509
2007	1501.8328243265908
2008	1933.9101927479298
2009	2657.39083351487
2010	2830.953824281611
2011	3246.343823916698
2018	4815.245053925777
2019	5529.634862799322