Year	including construction (constant 2010 US$)
1991	3617.83868326724
1992	3438.45639454254
1993	3020.30476786542
1994	2670.95962414736
1995	2309.42248488411
1996	2078.75885574165
1997	1843.22767033371
1998	1596.21076056428
1999	1421.72889224272
2000	1470.05428885987
2001	1476.42552618905
2002	1470.9087626133
2003	1475.31790169292
2004	1450.26978797211
2005	1453.88003110374
2006	1477.93280870213
2007	1492.83249088723
2008	1445.89795111615
2009	1395.886489236
2010	1400.82267398555
2011	1426.35952239665
2012	1435.67744452178
2013	1440.79507141403
2014	1494.47851928518
2015	1481.38302330585
2016	1369.22012926317
2017	1447.57556163669
2018	1503.80981768547