Year	US Dollars adjusted for inflation)
1991	23724.051
1992	17076.807
1993	10874.62
1994	12409.262
1995	12422.151
1996	17385.623
1997	16883.088
1998	17846.793
1999	15806.25
2000	17226.191
2001	16828.062
2002	17195.957
2003	17642.361
2004	18490.047
2005	19198.248
2006	19316.652
2007	19917.234
2008	20701.604
2009	20006.113
2010	20680.387
2011	21439.615
2012	20640.91
2013	21306.896
2014	21310.365
2015	21934.305
2016	22556.748
2017	22887.482
2018	23650.061
2019	24507.475
2020	25405.064
2021	26343.502
2022	27307.701