Year	current US$
1990	6252879.84931257
1991	6317756.75500278
1992	6082849.99742839
1993	5964444.56794128
1994	5870058.39901984
1995	5919753.77486816
1996	5543578.09732606
1997	5757553.30965937
1998	6286554.30457172
1999	6521041.57419011
2000	6440786.29489821
2001	6280020.65027391
2002	6473157.57968027
2003	6733421.29219652
2004	6812153.12815862
2005	7366121.5647473
2006	8206678.23774148
2007	9386862.61692051
2008	9833789.81897195
2009	9991014.940569
2010	10223134.4573214
2011	10568616.8627529
2012	10254013.8804104
2013	11466138.4440179
2014	10894998.6220744
2015	11409354.6457549
2016	11954928.0057656
2017	12115516.7969985
2018	12684918.6869587
2019	13522911.0975149
2020	13743512.4256423
2021	14375278.0308701