Year	% of GDP
1965	23.87672811059908
1966	25.402093438856266
1967	26.280971854702912
1968	31.299822852081487
1969	31.761861589604113
1970	31.359989010762774
1971	27.760449157829072
1972	25.48815231742061
1973	26.059654631083202
1974	22.147091515376065
1975	23.442548201913098
1976	16.718588366658818
1977	11.830213987415428
1978	13.348851786031684
1979	17.48253382246419
1980	14.458108985774446
1981	17.97282782792214
1982	19.904212646649533
1983	20.539952803581297
1984	21.16471702013607
1985	22.110103488513964
1986	16.11641677738667
1987	19.654871056290517
1988	23.154790826069306
1989	25.837400514392712
1990	25.346358631796413
1991	23.767695939014928
1992	29.508017140150976
1993	24.598075477814945
1994	23.909247628919697
1995	24.917368958416255
1996	25.350691180435625
1997	25.5686804595846
1998	22.473316478397866
1999	21.103688375765888
2000	23.204999367070624
2001	25.737545605228373
2002	27.173231609482418
2003	26.082900222218143
2004	26.36635344111804
2005	26.735315789774315
2006	28.065650435527633
2007	26.127330539095244
2008	23.967861854901127
2009	20.8573598281075
2010	19.90039738684104
2011	20.94249868219766
2012	19.63989754407112
2013	20.98700087144996
2014	22.018375993820623
2015	21.214670083395745
2016	21.192066894760007
2017	22.133481088639993
2018	23.2808862839382
2019	24.093302180168713