Year	Percent of GDP (Units)
1981	10.644
1982	11.549
1983	13.520
1984	11.720
1985	9.040
1986	19.215
1987	16.853
1988	13.275
1989	6.917
1990	11.556
1991	12.608
1992	16.889
1993	18.120
1994	20.600
1995	19.509
1996	14.492
1997	15.287
1998	19.022
1999	16.618
2000	15.715
2001	18.391
2002	15.592
2003	14.809
2004	15.450
2005	16.735
2006	17.465
2007	13.649
2008	11.655
2009	12.281
2010	13.783
2011	12.309
2012	11.912
2013	10.115
2014	11.026
2015	12.801
2016	13.693
2017	14.817
2018	15.070
2019	17.923
2020	18.829
2021	18.975
2022	16.500
2023	17.909
2024	16.706
2025	17.310
2026	17.736
2027	18.138
2028	18.083
2029	18.216