Year	including construction (constant 2015 US$)
1991	23542.895037964732
1992	25259.825577469066
1993	26782.842859992834
1994	23949.8158758249
1995	23143.944090382927
1996	23030.512655774208
1997	20047.14823824019
1998	19288.37498711502
1999	20850.85057634746
2000	24540.5672750897
2001	22655.493464507876
2002	21861.858593822966
2003	18826.317019590624
2004	19589.17392284723
2005	18595.313487655407
2006	20479.304959612484
2007	21137.61619621584
2008	19766.129928563518
2009	20812.367851716623
2010	18289.514007847418
2011	17628.24902413211
2012	15546.658700593132
2013	15864.10885957548
2014	14270.18060254862
2015	14583.962142702032
2016	14808.694541745752
2017	13369.684281676806
2018	11889.828588184359
2019	13776.38513050184
2020	11226.275580166764
2021	12823.75634206394
2022	11637.483049467444