Year	Percent of GDP (Units)
1980	19.114
1981	17.797
1982	18.300
1983	19.120
1984	20.073
1985	20.133
1986	20.021
1987	21.401
1988	23.665
1989	24.776
1990	23.191
1991	20.394
1992	19.237
1993	18.760
1994	18.787
1995	18.618
1996	18.808
1997	17.610
1998	18.077
1999	17.904
2000	18.322
2001	18.114
2002	18.123
2003	17.716
2004	17.692
2005	17.879
2006	18.210
2007	18.577
2008	17.606
2009	14.814
2010	16.149
2011	15.889
2012	16.040
2013	16.155
2014	17.390
2015	17.824
2016	17.859
2017	18.443
2018	18.050
2019	18.250
2020	17.526
2021	17.548
2022	19.328
2023	18.373
2024	16.826
2025	17.183
2026	17.613
2027	17.582
2028	17.484
2029	17.393