Year	current US$
1992	750000
1994	340000
1997	900000
1998	830000
1999	1330000
2000	2180000
2001	3460000
2002	3120000
2003	3940000
2004	4740000
2005	8450000
2006	13090000
2007	15050000
2008	15910000
2009	12070000
2010	11120000
2011	9890000
2012	10150000
2013	14290000
2014	13030000
2015	12910000
2016	13670000
2017	13740000
2018	26010000
2019	20510000
2020	18690000
2021	23340000
2022	28860000