Year	Percent of GDP (Units)
1980	30.540
1981	29.012
1982	31.011
1983	23.558
1984	25.141
1985	24.057
1986	19.941
1987	20.654
1988	23.135
1989	21.818
1990	15.859
1991	13.662
1992	10.532
1993	10.463
1994	12.841
1995	12.672
1996	12.904
1997	15.151
1998	14.650
1999	15.351
2000	14.379
2001	14.154
2002	14.651
2003	15.634
2004	16.215
2005	16.948
2006	22.129
2007	23.755
2008	22.647
2009	20.185
2010	22.236
2011	22.464
2012	21.473
2013	21.167
2014	20.895
2015	19.729
2016	20.539
2017	20.644
2018	21.218
2019	21.272
2020	21.013
2021	19.492
2022	18.072
2023	19.784
2024	19.254
2025	19.460
2026	19.507
2027	19.679
2028	19.830
2029	20.026