Year	including construction (constant 2010 US$)
1991	5259.63565411606
1992	5380.21471367506
1993	5571.24252592124
1994	5247.16051528587
1995	4352.79267242954
1996	3724.51394259199
1997	3835.95234509424
1998	3529.34451773014
1999	4117.52656710602
2000	3456.01657015019
2001	3177.8815007205
2002	2884.19178463758
2003	2804.51288900546
2004	2519.25992187473
2005	2298.20955191869
2006	2104.03700678146
2007	2014.9605712057
2008	1728.04359613005
2009	1688.35511553616
2010	1615.27050606886
2011	1629.52840925409
2012	1343.32458159767
2013	1203.34630324723
2014	1236.0079837018
2015	1254.69474327067
2016	1233.86907527603
2017	1273.44181686715
2018	1292.39378521903