Year	US Dollars adjusted for inflation)
1991	8772.794
1992	8738.678
1993	8367.377
1994	7647.991
1995	7739.458
1996	7829.932
1997	7509.778
1998	7567.407
1999	7104.307
2000	7447.989
2001	7489.944
2002	7608.425
2003	7417.342
2004	7445.432
2005	7782.188
2006	7887.208
2007	7361.695
2008	7441.739
2009	7646.944
2010	7905.367
2011	7821.616
2012	7653.153
2013	7731.911
2014	8082.367
2015	8089.002
2016	7722.435
2017	7288.132
2018	7333.037
2019	7067.969
2020	6932.933
2021	6819.52
2022	6724.679