Year	% of GDP
1972	16.15158860218359
1973	15.543943687200642
1974	15.95744500259104
1975	15.776690121722401
1976	16.401439268732915
1977	16.478312626150593
1978	16.35230067769553
1979	16.228312119968614
1980	16.871846648221698
1981	17.08552455699581
1982	17.46109679641507
1983	17.380830704020205
1984	17.347696055278238
1985	17.60796874622607
1986	17.938232353665878
1987	17.839053791686258
1988	17.823672964597872
1989	17.79399030123786
1990	18.170999705630063
1991	18.764571511728498
1992	18.661818793052337
1993	18.334462532233722
1994	18.65837234998508
1995	19.295385156993675
1996	19.41899656085446
1997	19.84010782474492
1998	20.11409608656406
1999	19.864696689436716
2000	20.1720980803633
2001	19.862649727023758
2002	19.361347459901975
2003	19.16150256899235
2004	19.132929006617672
2005	19.773940926868875
2006	20.070857720691897
2007	20.234778820066584
2008	20.013531380725116
2009	19.00561541486559
2010	19.288902047865037
2011	19.51206949782667
2012	19.11837871258372
2013	19.340859066433985
2014	19.329289659548543
2015	19.066427498293432
2016	18.970100686459034
2017	19.165914807412584
2018	19.323241081300534
2019	19.247449664575743
2020	18.9418915228628
2021	19.64437082482267
2022	19.8866129329474