Year	including construction (constant 2010 US$)
1991	39144.7367363063
1992	38295.4094645097
1993	37390.8327371346
1994	38893.4688831394
1995	38198.7047068038
1996	38885.0564881
1997	40832.7217071768
1998	41770.7889030766
1999	42584.6984189876
2000	44259.840585934
2001	44600.1229620246
2002	45069.4953037435
2003	46010.4718998897
2004	47815.1442631253
2005	48260.3654935076
2006	49725.4664261613
2007	50448.839091538
2008	50042.70789237
2009	47846.0526610066
2010	50523.7578054703
2011	52163.8913154056
2012	51719.7848144793
2013	51931.5045297232
2014	52280.1590317521
2015	53498.2184920714
2016	54478.6818974651
2017	57021.4515292685
2018	58205.1652839295