Year current US$ 1970 444.78085210148646 1971 464.1253133754602 1972 503.89712169839305 1973 574.9773236975512 1974 675.7915846189159 1975 629.1722385325495 1976 586.9510603453089 1977 525.4037215992928 1978 520.5950203231454 1979 538.355327632914 1980 544.0600354035358 1981 606.174438866932 1982 515.319049373984 1983 512.7238306167079 1984 546.782713499315 1985 463.783393336768 1986 538.454120942526 1987 579.4014424934712 1988 792.7475544280916 1989 937.6204111447893 1990 1039.3052604405407 1991 1082.6720026978671 1992 1112.9334610573271 1993 1094.2944159377078 1994 1231.5734551662395 1995 1243.8825454842574 1996 1387.8469805507987 1997 1426.1900411871216 1998 1431.923002829958 1999 1535.321914758789 2000 1564.0148926061117 2001 1451.4844950747352 2002 1752.8018103119389 2003 2012.447045078898 2004 2328.493001690848 2005 2311.3377538647883 2006 2402.4801060401264 2007 2803.2484671164602 2008 3103.0407766629637 2009 2697.6348933879613 2010 3043.1666802949812 2011 3663.2670552242616 2012 3624.984288960363 2013 3536.901505044381 2014 3556.379727865818 2015 3384.383201476394 2016 3836.073002510029 2017 4181.4365860098405 2018 4419.259997711515 2019 4940.050982684493 2020 4674.911402552557 2021 5372.760238650419 2022 5221.533069958072 2023 5465.102806705612