Year constant 2011 international $ 1990 36482.6293971339 1991 35890.4172621614 1992 36554.6663054192 1993 37072.7182330706 1994 38060.7125865099 1995 38647.0706335484 1996 39588.9666425529 1997 40823.9968332348 1998 42117.0618078907 1999 43671.7031756969 2000 45070.3050232696 2001 45139.5565311395 2002 45532.1585126381 2003 46434.8341199557 2004 47795.3281118622 2005 48991.1102382932 2006 49807.05435561 2007 50451.7025862745 2008 50077.7432251257 2009 48320.161724579 2010 49288.3093728832 2011 49830.0235320104 2012 50507.9327893214 2013 51069.4586498742 2014 51941.984416649 2015 52895.8425997375 2016 53267.9323489084 2017 54159.0705083508