Year constant 2021 international $ 1990 3891.5868582725006 1991 3887.555589109814 1992 3609.3015321799876 1993 3347.277820025714 1994 2900.84358875493 1995 3137.267134228813 1996 3212.2379394303125 1997 3235.9129400269458 1998 3243.615488869328 1999 3267.7925593245413 2000 3229.3826040031577 2001 3160.5977698060383 2002 3136.190291891521 2003 3188.281300033259 2004 3096.2248014678626 2005 3129.3788002983692 2006 3150.4538690883387 2007 3242.472365986696 2008 3275.9718306400905 2009 3415.6596968223766 2010 3188.3320090329653 2011 3316.524208386097 2012 3285.8801569302323 2013 3370.912427623483 2014 3421.521645973695 2015 3418.3842198415987 2016 3434.4357809875887 2017 3474.080227008305 2018 3481.001086047118 2019 3376.865591425054 2020 3217.7964874114755 2021 3118.456702001893 2022 3029.8942913785163 2023 2934.9258015897326