Year	current US$
1990	1880000
1991	8000000
1992	4920000
1993	6700000
1994	6000000
1997	7820000
1998	7150000
1999	7570000
2000	8610000
2001	9730000
2002	12650000
2003	17660000
2004	21260000
2005	27260000
2006	41500000
2007	48250000
2008	48410000
2009	34420000
2010	28750000
2011	25570000
2012	26120000
2013	34910000
2014	37330000
2015	39860000
2016	58720000
2017	68270000
2018	74210000
2019	61420000
2020	57900000
2021	70840000
2022	94380000