Year	Percent of GDP (Units)
1980	33.662
1981	33.838
1982	34.391
1983	32.213
1984	34.619
1985	35.304
1986	34.917
1987	34.863
1988	36.793
1989	37.286
1990	37.930
1991	35.878
1992	33.594
1993	33.946
1994	33.905
1995	32.923
1996	32.910
1997	34.521
1998	34.875
1999	35.590
2000	37.636
2001	34.241
2002	32.908
2003	36.735
2004	37.121
2005	38.405
2006	40.195
2007	35.080
2008	28.589
2009	33.937
2010	38.884
2011	34.656
2012	35.419
2013	34.711
2014	32.420
2015	33.950
2016	32.727
2017	31.175
2018	31.181
2019	30.384
2020	30.141
2021	33.148
2022	33.884
2023	32.081
2024	32.567
2025	32.295
2026	32.760
2027	32.635
2028	33.134
2029	33.056