Year	% of GDP
1963	12.7705648572747
1964	14.2862316707528
1965	12.9847796370196
1966	13.5906588680102
1967	14.6621757469621
1968	15.047313907659
1969	15.1595654686235
1970	16.1628444454874
1971	18.4669763205373
1972	20.2892027714222
1973	19.9504432905396
1974	20.118194697146
1975	20.7897985993534
1976	26.0631430854695
1977	27.3258871880988
1978	28.0886283942768
1979	27.9713202361515
1980	30.5009046456557
1981	32.1230757200956
1982	35.1624551356177
1983	39.4256480342488
1984	41.2228521635475
1985	40.0147576550104
1986	35.0644168762381
1987	32.427705192687
1988	30.6382984736481
1989	29.5198432722562
1990	30.8163827450431
1991	27.6190451464007
1992	28.4102861747562
1993	29.1084474779556
1994	25.19664097315
1995	24.2075587887488
1996	23.119342690279
1997	23.1952944594489
1998	23.4901270042474
1999	24.2550037016353
2000	23.0051505705908
2001	26.1514346026679
2002	25.7327108946487
2003	25.2014445841063
2004	25.1763699253165
2005	26.051622106985
2006	25.1474945665151
2007	25.4052110228981
2008	25.5422880048102
2009	27.8356417657211
2010	29.2579203946769
2011	30.0090160613769
2012	30.2449510071114
2013	30.7522364201106
2014	32.838610244347
2015	35.4471454672469
2016	38.4523501804314
2017	39.4312955202674
2018	44.2527486593998