Year	Percent of GDP (Units)
1980	22.059
1981	23.206
1982	21.713
1983	19.725
1984	21.839
1985	20.308
1986	18.882
1987	19.548
1988	20.564
1989	19.674
1990	18.674
1991	18.733
1992	17.607
1993	16.970
1994	17.782
1995	18.681
1996	19.570
1997	20.773
1998	21.315
1999	20.851
2000	20.741
2001	19.581
2002	18.303
2003	17.351
2004	17.662
2005	18.052
2006	19.126
2007	17.354
2008	14.975
2009	13.798
2010	15.288
2011	16.238
2012	18.288
2013	18.475
2014	19.571
2015	19.611
2016	18.472
2017	18.882
2018	19.126
2019	19.406
2020	18.463
2021	17.804
2022	18.256
2023	16.584
2024	16.909
2025	17.137
2026	17.543
2027	17.891
2028	18.184
2029	18.497