Year including construction (constant 2010 US$) 1997 41122.8856189942 1998 41410.4793738762 1999 40859.9456680807 2000 37224.5442373049 2001 37688.8458725693 2002 39423.8298290748 2003 40585.5275193571 2004 40751.8142113994 2005 39594.0152868609 2006 47810.9700895588 2007 49917.5186230117 2008 49097.498181566