Year	US Dollars adjusted for inflation)
1991	1478.386
1992	1946.915
1993	2081.257
1994	2346.995
1995	2660.205
1996	4317.896
1997	10522.782
1998	12412.377
1999	14939.012
2000	16961.449
2001	26803.637
2002	30482.959
2003	33103.18
2004	43837.5
2005	48406.992
2006	49732.621
2007	54753.504
2008	61380.82
2009	58586.789
2010	50129.816
2011	51284.453
2012	53146.734
2013	48329.797
2014	45670.793
2015	39298.238
2016	34151.242
2017	31227.389
2018	29435.719
2019	27986.035
2020	26720.752
2021	26194.094
2022	25814.1