Year constant 2010 US$ 1990 2590.61573213178 1991 3427.64969898053 1992 5043.33082403313 1993 5538.38116177997 1994 5369.0746383537 1995 5422.30330356016 1996 5454.52272255567 1997 5192.38498601663 1998 5240.76458804263 1999 5216.55767981585 2000 5158.80533160139 2001 5230.47306857708 2002 5116.12745630388 2003 5046.41880248873 2004 5088.84513777954 2005 4790.6870242366 2006 4892.09338169111 2007 5243.44383121773 2008 5748.7355890565 2009 6430.49496901526 2010 6791.55401108356 2011 6386.53613592857 2012 6267.86441660058 2013 5916.34616548243 2014 6073.18240245452 2015 5930.99637732623 2016 6169.7106874605 2017 6326.8265529624 2018 6206.7755110229