Year	US Dollars adjusted for inflation)
1991	26080.715
1992	25996.752
1993	26022.332
1994	26468.982
1995	27913.863
1996	29069.414
1997	29116.188
1998	29420.447
1999	30540.221
2000	32099.877
2001	32871.773
2002	33051.301
2003	34507.66
2004	36511.363
2005	38312.82
2006	40511.629
2007	41934.984
2008	42571.469
2009	41130.215
2010	42347.938
2011	42961.906
2012	42431.93
2013	41777.863
2014	42550.793
2015	43937.289
2016	44118.688
2017	45766.371
2018	47111.25
2019	48781.559
2020	50116.195
2021	51336.027
2022	52569.598