Year	Percent of GDP (Units)
1980	24.841
1981	19.315
1982	23.517
1983	22.705
1984	21.694
1985	20.588
1986	23.995
1987	19.853
1988	22.333
1989	20.783
1990	20.938
1991	23.489
1992	20.752
1993	20.762
1994	19.971
1995	20.040
1996	19.797
1997	18.662
1998	22.491
1999	20.509
2000	19.825
2001	18.664
2002	18.435
2003	21.005
2004	19.706
2005	14.681
2006	15.224
2007	12.982
2008	9.954
2009	7.415
2010	7.820
2011	3.853
2012	9.537
2013	9.366
2014	9.386
2015	10.586
2016	10.462
2017	9.446
2018	9.547
2019	10.175
2020	7.072
2021	10.576
2022	10.375
2023	9.870
2024	15.509
2025	18.173
2026	19.977
2027	21.528
2028	22.542
2029	23.061