Year	current US$
1990	2059991.82840552
1991	2177573.09654995
1992	2411269.40159513
1993	2523964.23008305
1994	2635863.44580773
1995	2751685.42053209
1996	2865114.42411053
1997	3311220.09432752
1998	2910255.47834682
1999	3372691.42640996
2000	2784241.68869895
2001	2911026.13736737
2002	3022914.40993525
2003	3992447.69705672
2004	4412487.24004896
2005	4885911.55654628
2006	5395233.51367556
2007	5923247.177794
2008	5904302.69750898
2009	6352019.8216922
2010	6858778.06928936
2011	7158812.73574909
2012	7767512.13506707
2013	8081346.51247703
2014	9091104.73961627
2015	9736389.34846143
2016	11132581.913501
2017	11599298.8636577
2018	12537198.3255749
2019	13457044.3908461
2020	13650799.0905881
2021	15190422.0766706