Year constant 2010 US$ 1970 9807.10351183716 1971 9964.89168025015 1972 10731.0814628602 1973 11299.8399642004 1974 11437.391659381 1975 11738.7949098576 1976 11924.251358335 1977 11821.193076803 1978 12061.9678438685 1979 12731.5995490422 1980 13011.3808862679 1981 13126.8003432277 1982 13737.4931974748 1983 14081.6279273385 1984 14460.1950384507 1985 14987.8995570854 1986 15534.4361287797 1987 16216.8131935716 1988 17068.3129711742 1989 17789.8210252869 1990 17658.5288256837 1991 17009.7251928225 1992 16199.4021843529 1993 15694.8488615612 1994 16038.5946774749 1995 16774.0534557386 1996 17346.8832437301 1997 17887.0037766917 1998 18689.2078562963 1999 19279.4404038148 2000 19616.3496034537 2001 20133.6203785341 2002 20613.5695864242 2003 21437.4277904815 2004 22148.167698357 2005 22785.4398540108 2006 23622.646849272 2007 24345.7579130383 2008 24746.4072610057 2009 23961.5234486395 2010 24583.5865136652 2011 25186.8825542186 2012 25151.723286216 2013 24922.6358721787 2014 25008.6872145317 2015 25311.4825858732 2016 25805.6925717115 2017 26051.5325954464 2018 26517.7711695782