Year	including construction (constant 2010 US$)
1991	27795.0859688707
1992	27878.1227813934
1993	28320.1116752351
1994	25373.8873416724
1995	26334.0227161758
1996	26786.9356436391
1997	29087.3951992006
1998	30294.6759522412
1999	29210.9718931491
2000	28518.0006002052
2001	26867.008279635
2002	26694.7555464216
2003	24877.6912289354
2004	24426.3329686407
2005	25967.0394826856
2006	26211.2943817967
2007	22278.4973084375
2008	22606.7903684029
2009	24693.8575231036
2010	25888.1763779562
2011	24350.2641699713
2012	22500.6512178721
2013	21332.4580861455
2014	21981.1718316945
2015	22362.5511980768
2016	22036.4332696173
2017	22629.6375877648
2018	23820.5007551015