Year	current US$
1990	1332935.88896828
1991	1537110.42109409
1992	2277309.9903954
1993	2103303.52506921
1994	2342989.72960687
1995	2598814.00828031
1996	3024287.44767222
1997	3311220.09432752
1998	3766212.97197824
1999	3905221.65163258
2000	3897938.36417854
2001	4463573.41062997
2002	4836662.75559687
2003	5253220.71994124
2004	5074360.3424941
2005	5816561.55844248
2006	6376184.86228953
2007	7210909.50763966
2008	7782944.28311935
2009	22370156.4233892
2010	8287690.11382686
2011	9246800.06147441
2012	12738719.7903948
2013	10344123.3047614
2014	8417689.23922985
2015	9388661.49054484
2016	10055235.2421865
2017	10850956.6057999
2018	12537198.3255749
2019	13457044.3908461
2020	11533758.4662223
2021	12376996.6773342