Year	US Dollars adjusted for inflation)
1991	1210.114
1992	790.725
1993	530.514
1994	409.976
1995	381.751
1996	406.477
1997	793.134
1998	956.843
1999	1087.183
2000	1330.604
2001	1313.581
2002	1331.079
2003	900.005
2004	908.536
2005	931.115
2006	971.994
2007	1023.567
2008	1041.361
2009	1042.964
2010	1048.368
2011	1100.008
2012	1155.906
2013	1225.463
2014	1200.302
2015	1167.846
2016	1117.304
2017	1126.421
2018	1154.2
2019	1190.048
2020	1234.103
2021	1278.881
2022	1323.027