Year including construction (constant 2015 US$) 1991 3438.5155884365804 1992 4054.5194403696532 1993 3636.0335228329172 1994 3451.779166470189 1995 2756.302876391421 1996 2729.499977040132 1997 2381.1943688318274 1998 2087.4005517399296 1999 1619.8995546819235 2000 1509.984974307991 2001 1263.8348876524915 2002 1012.6501555117713 2003 1120.3287820596188 2004 1113.820789344595 2005 1163.6792987235247 2006 1275.7808335420953 2007 1329.8470191474166 2008 1212.2163385271901 2009 1170.0098007436086 2010 1282.9776685732552 2011 1395.1222845858613 2012 3032.3286189923815 2013 5640.702852688118 2014 6104.43641595299 2015 1228.972469339257 2016 1305.4835629676827 2017 1036.603297980991 2018 858.8066763122896 2019 893.1625271599936 2020 773.9866833619128 2021 863.3214763978028 2022 881.8218528820748