Year	Percent of GDP (Units)
1980	17.170
1981	15.212
1982	14.294
1983	14.093
1984	11.950
1985	11.221
1986	11.034
1987	14.068
1988	13.016
1989	11.178
1990	12.079
1991	14.927
1992	15.199
1993	15.461
1994	15.677
1995	15.202
1996	15.053
1997	18.473
1998	19.135
1999	17.108
2000	16.249
2001	15.990
2002	13.576
2003	14.135
2004	15.644
2005	16.294
2006	18.403
2007	18.585
2008	22.269
2009	18.484
2010	18.436
2011	19.987
2012	22.312
2013	22.282
2014	20.874
2015	19.392
2016	17.389
2017	15.924
2018	14.853
2019	14.121
2020	16.433
2021	18.277
2022	18.917
2023	17.255
2024	17.565
2025	17.553
2026	17.590
2027	17.415
2028	17.323
2029	17.224