Year	% of GDP
1971	4.540252250807467
1972	4.469538738084507
1973	4.726418544816274
1974	5.058210195167449
1975	5.897109361030707
1976	6.112194476938441
1977	6.313836564478498
1978	6.4546521875719725
1979	6.614367483307053
1980	7.0313890347563905
1981	7.028505849125216
1982	7.032176380437879
1983	6.6458303248879895
1984	6.592950963250858
1985	6.544817293771862
1986	6.761708417463363
1987	7.007904872048998
1988	7.017143235447942
1989	7.133358262938033
1990	7.601401653691765
1991	7.563252589903754
1992	7.857995677626969
1993	7.836350083340523
1994	7.875536584353127
1995	8.161715426947769
1996	7.44625223859405
1997	7.743274377760746
1998	7.928081209964241
1999	8.252420510928497
2000	8.570544094634235
2001	8.628178125800293
2002	8.969776370362116
2003	9.171610542090061
2004	9.855146480550514
2005	10.554878627074729
2006	11.054658166235363
2007	11.838327331039968
2008	12.423356971466259
2009	11.8725187821476
2010	12.032407588841819
2011	12.409034117341827
2012	12.594061248587382
2013	13.09931151925395
2014	13.730775075556979
2015	13.92383228948832
2016	13.930657514057982
2017	14.437340713917644
2018	14.828885919810173
2019	15.166143276838502
2020	13.34720704142901
2021	13.987129558673749
2022	15.48242919456574
2023	15.848004539154767