Year	current US$
1994	2805300000
1995	3285600000
1996	3389700000
1997	3702600000
1998	3898200000
1999	4032000000
2000	3866800000
2001	3765400000
2002	3397900000
2003	3932100000
2004	4612900000
2005	5276300000
2006	5598200000
2007	6017600000
2008	7376700000
2009	7761200000
2010	9024700000
2011	10202400000
2012	10838500000
2013	11879800000
2014	12476000000
2015	12348300000
2016	13534000000
2017	14301800000
2018	14468100000
2019	15427900000
2020	13778800000
2021	16028300000
2022	19136500000
2023	17682600000