Year % GDP 1973 14.675324675324674 1974 16.29398663697105 1975 20.446529080675422 1976 19.646413502109706 1977 18.456127080181545 1978 25.451046590141797 1979 24.66560968578841 1980 23.28847930634195 1981 26.43641445398283 1982 24.06698646565016 1983 23.676903184095686 1984 21.38629198080877 1985 19.83214953271028 1986 16.10893500925655 1987 17.389725048347767 1988 16.877455030826923 1989 18.672939125017006 1990 16.400010637739783 1991 20.79355921363212 1992 18.64610850206513 1993 16.86611557531499 1994 18.122411911738233 1995 15.061049797130302 1996 14.306563156836491 1997 14.007730837332591 1998 13.44103881802331 1999 13.097644023348279 2000 10.981330297613951 2001 8.805918642923059 2002 10.237564043024804 2003 12.749026712782666 2004 15.341200879410316 2005 17.166558898685732 2006 19.06984435463038 2007 21.20887945890369 2008 20.308873614557978 2009 20.59913600690213 2010 19.12622395978266 2011 22.378484097854383 2012 19.188110172300284 2013 20.847929922441462 2014 21.163394981955484 2015 20.44698145964275 2016 21.050204295964008 2017 20.91493655385279 2018 20.886251196364974 2019 20.77111699174411 2020 21.766875234959407 2021 20.63534134087195 2022 21.145707395019606 2023 21.417678616259078