Year	Percent of GDP (Units)
1980	19.856
1981	19.186
1982	19.106
1983	19.429
1984	20.462
1985	20.854
1986	21.772
1987	21.516
1988	22.382
1989	21.898
1990	21.552
1991	20.718
1992	18.880
1993	19.289
1994	19.051
1995	21.004
1996	20.894
1997	21.379
1998	21.673
1999	21.594
2000	22.330
2001	22.084
2002	22.954
2003	23.620
2004	22.803
2005	22.133
2006	21.714
2007	21.010
2008	19.551
2009	19.215
2010	18.648
2011	17.848
2012	18.522
2013	19.248
2014	19.593
2015	21.012
2016	21.917
2017	22.171
2018	22.346
2019	22.936
2020	21.087
2021	22.351
2022	22.093
2023	22.910
2024	23.137
2025	23.619
2026	23.377
2027	23.246
2028	23.081
2029	22.979