Year	Percent of GDP (Units)
1980	29.684
1981	31.905
1982	24.817
1983	25.265
1984	23.801
1985	20.720
1986	19.802
1987	16.724
1988	19.865
1989	21.310
1990	18.231
1991	17.836
1992	15.715
1993	14.161
1994	16.471
1995	17.700
1996	16.568
1997	16.294
1998	16.428
1999	15.655
2000	15.060
2001	14.574
2002	15.036
2003	15.657
2004	16.960
2005	16.832
2006	18.490
2007	19.326
2008	21.287
2009	18.767
2010	17.596
2011	18.853
2012	18.585
2013	19.169
2014	18.488
2015	18.633
2016	16.960
2017	16.611
2018	16.171
2019	15.821
2020	12.538
2021	13.045
2022	15.379
2023	15.624
2024	15.438
2025	15.696
2026	15.853
2027	15.942
2028	16.040
2029	16.212