Year	Percent of GDP (Units)
1981	20.588
1982	20.693
1983	19.689
1984	18.951
1985	19.711
1986	19.999
1987	19.100
1988	19.213
1989	20.049
1990	20.589
1991	22.465
1992	22.016
1993	20.636
1994	21.427
1995	21.891
1996	22.881
1997	23.871
1998	24.370
1999	24.674
2000	26.344
2001	26.300
2002	27.125
2003	27.148
2004	27.910
2005	27.721
2006	29.199
2007	29.155
2008	28.870
2009	29.703
2010	30.469
2011	29.972
2012	30.870
2013	31.535
2014	30.450
2015	30.285
2016	32.112
2017	30.708
2018	30.610
2019	31.138
2020	31.418
2021	30.794
2022	29.350
2023	30.215
2024	29.616
2025	29.485
2026	30.064
2027	30.881
2028	31.537
2029	32.133