Year current international $ 1990 3378.3213006815467 1991 3132.928390660837 1992 2860.3696200814284 1993 2793.1481661324315 1994 2874.1793608867233 1995 3082.9438541897325 1996 3173.1976845059235 1997 3318.8677012476082 1998 3434.551173950956 1999 3555.594957298248 2000 3644.059705824048 2001 3802.5883495646854 2002 4008.758943838262 2003 4336.288882331679 2004 4884.312977992093 2005 5357.879544177066 2006 5944.606735214175 2007 6668.333587644814 2008 7322.383040562766 2009 7184.540907089958 2010 7632.237871943933 2011 8998.687721824039 2012 10323.88686140164 2013 10640.056660393382 2014 11126.6221730274 2015 10677.416542356947 2016 10717.134620839322 2017 11285.582280099738 2018 12489.546156251172 2019 13753.313252953267 2020 13829.802562999805 2021 14951.136567990365 2022 16559.074533300794 2023 18108.003549666522