Year	% of GDP
1970	73.91923037499063
1971	75.53443324833485
1972	76.39023243656725
1973	75.7391760715773
1974	74.30264789752357
1975	76.31780787676158
1976	74.71040347221648
1977	74.72708393391275
1978	74.09115744990282
1979	74.63088968617012
1980	76.10373422848357
1981	77.5002364496776
1982	77.74827619920168
1983	77.41674395136465
1984	77.2931463115393
1985	77.41904331984101
1986	77.11747908513624
1987	77.61293448789661
1988	77.53872007587098
1989	77.85527476036678
1990	77.399678992784
1991	77.76466560683589
1992	78.55118546523488
1993	77.92117878722652
1994	77.72538974346786
1995	76.29723128881636
1996	76.11424411403031
1997	76.78723802184506
1998	77.232347440559
1999	77.98619664987307
2000	78.28554983198322
2001	77.89342345066868
2002	77.67175613506417
2003	78.36508416331276
2004	78.14823051960347
2005	78.92945486759719
2006	78.86358665508072
2007	78.09333161097466
2008	78.98881198832947
2009	81.1116889783072
2010	81.27828730386548
2011	80.93250073782909
2012	81.10672230216146
2013	80.70869947523836
2014	80.14526311080655
2015	79.8789504366133
2016	79.15079301242349
2017	79.0826438990188
2018	79.06898261660102
2019	78.43446283455
2020	78.70040797240712
2021	76.10463624764577
2022	78.54066784054051
2023	77.70158526838044