Year	% of GDP
1965	17.038428311026692
1966	18.616166557112948
1983	26.96720555022235
1984	26.34284903633359
1985	26.092058888549538
1986	27.81611399115212
1987	28.624838185767814
1988	29.011398802937723
1997	30.239790787822248
1998	30.245353125036488
1999	30.42614883079003
2000	29.497906455588954
2001	28.79261816707174
2002	29.06485914072962
2003	30.5840899998997
2004	32.90236309728408
2005	34.92911141549595
2006	37.30676465255562
2007	39.03654524111154
2008	36.98037600534702
2009	38.33427933442093
2010	39.51419011057535
2011	39.86885178972223
2012	40.82354255361944
2013	42.11381912875918
2014	43.81143838083412
2015	45.81925186520269
2016	46.25016981952102
2017	45.97244607059556
2018	45.623100938853575
2019	45.79171921025751
2020	48.65358854338802
2021	45.89772078070392