Year	% of GDP
1980	14.439391296295637
1981	17.155766441005802
1982	17.36327909300766
1983	16.56273677015041
1984	16.484257569959894
1985	15.830943703721607
1986	16.17645482922319
1987	15.473442028360187
1988	15.735983069344538
1989	16.120914434896683
1990	16.458675515153516
1991	16.895947463329385
1992	17.305029276693666
1993	17.94683201090131
1994	18.402556188374
1995	19.1197958221399
1996	20.729950603737944
1997	21.81621450540574
1998	22.121412823960174
1999	22.721370303465715
2000	23.808562573136875
2001	24.17430673069332
2002	24.341416136672855
2003	24.679188861283382
2004	24.99183394470041
2005	25.83043551458635
2006	26.144145747429853
2007	26.17849706720466
2008	26.20227140039912
2009	26.206057015753576
2010	26.246656176057666
2011	27.42097336860339
2012	28.262335009718658
2013	28.38962075364656
2014	28.57787571155631
2015	28.886689247008
2016	30.23976391799852
2017	30.946873115567513
2018	31.82257477044314
2019	32.21373311262665
2020	31.307938187323302
2021	31.01873873571718
2022	32.04727558090502
2023	30.951200083494367