Year	including construction (constant 2015 US$)
1991	16586.849203471622
1992	16238.487205344372
1993	16116.147548864741
1994	16185.913494042852
1995	16241.76277404981
1996	16199.519475641486
1997	16280.74503999087
1998	15721.975638881227
1999	15352.098673728997
2000	15621.206627759215
2001	15094.039133399247
2002	14849.967868690781
2003	15007.350470821433
2004	14883.802494234978
2005	15590.076858929073
2006	16368.551747912765
2007	17286.237827061475
2008	20616.40095522754
2009	20449.30306219717
2010	23856.91125314546
2011	23203.304369057583
2012	23506.635594081432
2013	23272.23296551984
2014	22722.580859542468
2015	21596.118746917007
2016	22110.357107336138
2017	21919.08824613452
2018	22026.240840032366
2019	22826.39410951378
2020	23214.213404356433
2021	25967.153573638567
2022	23443.767303457746