Year	including construction (constant 2010 US$)
1991	26347.9219819147
1992	25856.7209089893
1993	26386.6839381586
1994	26611.6323065954
1995	27633.3581441475
1996	27368.7334546795
1997	27727.8359983176
1998	26807.0199862347
1999	25821.9322349748
2000	24703.1158591084
2001	23048.3177669809
2002	22110.5647163966
2003	21762.8098874363
2004	19882.9216403555
2005	20365.7951452136
2006	19899.3651754767
2007	17771.6609469136
2008	17982.1451269198
2009	18616.151477292
2010	17800.9290102812
2011	19696.6967248381
2012	19973.5630760091
2013	20388.7785134448
2014	19572.916596924
2015	19219.766640604
2016	20392.4010906604
2017	19860.1407039865
2018	19795.7636350634