Year	Percent of GDP (Units)
1980	25.452
1981	27.898
1982	23.731
1983	21.653
1984	21.765
1985	24.970
1986	24.320
1987	26.177
1988	23.570
1989	25.615
1990	26.270
1991	18.402
1992	20.434
1993	21.029
1994	20.771
1995	19.542
1996	17.750
1997	20.054
1998	22.662
1999	21.080
2000	20.687
2001	20.115
2002	19.886
2003	18.965
2004	18.930
2005	18.964
2006	21.086
2007	23.287
2008	24.611
2009	18.453
2010	19.834
2011	20.048
2012	19.854
2013	19.590
2014	19.223
2015	18.854
2016	18.889
2017	18.065
2018	18.370
2019	16.064
2020	16.163
2021	18.582
2022	18.271
2023	15.400
2024	16.168
2025	16.442
2026	16.474
2027	16.349
2028	16.653
2029	16.857