Year % of GDP 1973 4.75323009490967 1974 4.7467999458313 1975 5.16753005981445 1976 5.45474004745483 1977 4.45267009735107 1978 4.53252983093262 1979 4.46765995025635 1980 4.23264980316162 1981 4.44054985046387 1982 4.5327000617981 1984 4.04568004608154 1985 3.54629993438721 1986 3.43031001091003 1987 3.91739010810852 1988 4.4258599281311 1989 4.81824016571045 1994 5.92605018615723 1995 5.74212980270386 1996 6.38371992111206 1997 6.15721988677979 1999 6.6362099647522 2009 6.54333829879761 2010 6.59741258621216 2011 6.55125284194946 2012 6.53085327148438 2013 5.88865995407104 2014 6.07375717163086 2015 5.70862007141113 2016 5.50734996795654 2017 5.28027009963989 2018 5.19210004806519 2019 5.17202997207642 2020 5.6548900604248 2021 5.54056978225708 2022 5.50567865371704