Year % of GDP 1962 8.04278459087963 1963 7.86794047064536 1964 7.881473455152234 1965 8.407903160961544 1966 7.854606991943788 1967 8.658879406225731 1968 10.122854027506454 1969 11.69103788460826 1970 12.790466202493006 1971 12.665300834652676 1972 11.63367218884656 1973 12.438128144328063 1974 15.99321522221048 1975 15.135355820455656 1976 19.717653190404775 1977 17.82447717946843 1978 24.72463404826037 1979 24.836283912775446 1980 21.402708855991403 1981 27.23331734930994 1982 30.72982998209707 1983 28.577220907369338 1984 30.706871227778866 1985 29.606192770107153 1986 31.89533786599198 1987 30.90039043747072 1988 24.881419371745654 1989 23.941171432906515 1990 25.5275706767815 1991 25.82543285724125 1992 21.360745965444565 1993 22.96885991876148 1994 21.218178839871683 1995 21.656457827515712 1996 17.682037021038884 1997 15.948195879900204 1998 14.909432841030105 1999 15.59361260075388 2000 16.47637304059175 2001 14.621676136526105 2002 13.048636545613348 2003 14.261559423770212 2004 17.42481977742484 2005 17.71263521797335 2006 21.485378565233646 2007 22.909191339623764 2008 25.211879136787335 2009 26.52449293627159 2010 28.77707048099224 2011 31.01603386896289 2012 31.57977673615328 2013 34.31999057275982 2014 33.50585238185939 2015 37.542848159991685 2016 39.9053406007563 2017 42.56444626817304 2018 44.20758681984428 2019 44.03748141383784 2020 47.26575437228618 2021 48.865045700762856 2022 51.175225068870574 2023 49.99951819813375