Year current US$ 1970 103.3596301515078 1971 108.43535935457037 1972 119.81332924400427 1973 142.47829068726332 1974 141.6270502362115 1975 154.9927372173713 1976 140.86349623693732 1977 157.51540356751832 1978 131.67051347627762 1979 147.38523923724955 1980 150.7808982110738 1981 153.11972180272465 1982 162.3961732497199 1983 185.57422380314665 1984 210.7053808009481 1985 250.56151936379396 1986 244.9805982924615 1987 216.84556184035387 1988 247.8239805596516 1989 268.55696427014703 1990 270.4214480303131 1991 289.2443656609604 1992 321.1879279757848 1993 327.68205520572195 1994 411.63175357181234 1995 520.4059319892435 1996 604.9111421554917 1997 666.8033694208044 1998 699.7297879402207 1999 733.2327387800133 2000 798.025383405993 2001 876.8712485553013 2002 965.1136191436113 2003 1084.0777355583514 2004 1246.471516986841 2005 1428.7871446123247 2006 1700.974005657122 2007 2168.1968899697545 2008 2703.0967889887634 2009 3041.7821389814762 2010 3487.2589929554947 2011 4132.672200880118 2012 4770.26318228205 2013 5239.785134007379 2014 5753.408667802122 2015 6012.71864865345 2016 6078.485221504067 2017 6658.943734734787 2018 7331.859806010509 2019 7470.113814859154 2020 7510.442655693926 2021 9015.348004136764