Year	Percent of GDP (Units)
1980	20.124
1981	17.014
1982	18.271
1983	18.364
1984	20.603
1985	22.100
1986	23.785
1987	22.022
1988	21.057
1989	21.323
1990	20.798
1991	19.612
1992	18.940
1993	17.378
1994	18.734
1995	20.686
1996	20.064
1997	22.062
1998	22.655
1999	20.888
2000	22.352
2001	21.825
2002	21.343
2003	20.922
2004	21.691
2005	22.206
2006	24.298
2007	25.278
2008	23.984
2009	19.088
2010	18.076
2011	19.127
2012	19.466
2013	19.691
2014	20.091
2015	20.631
2016	21.775
2017	22.053
2018	22.599
2019	21.853
2020	22.505
2021	23.985
2022	23.881
2023	21.902
2024	21.338
2025	21.382
2026	21.442
2027	21.500
2028	21.546
2029	21.589