Year	Percent of GDP (Units)
1980	21.333
1981	21.112
1982	19.299
1983	15.277
1984	14.410
1985	17.538
1986	17.463
1987	20.401
1988	20.806
1989	22.646
1990	18.451
1991	19.936
1992	19.079
1993	21.019
1994	23.559
1995	17.292
1996	17.267
1997	17.764
1998	18.165
1999	17.390
2000	18.903
2001	18.742
2002	17.449
2003	16.857
2004	17.913
2005	17.205
2006	17.816
2007	19.819
2008	21.619
2009	18.796
2010	21.801
2011	21.826
2012	21.417
2013	21.694
2014	20.548
2015	17.412
2016	14.970
2017	14.626
2018	15.095
2019	15.517
2020	16.116
2021	19.522
2022	18.088
2023	16.086
2024	15.870
2025	15.691
2026	15.599
2027	15.516
2028	15.444
2029	15.383