Year	Percent of GDP (Units)
1980	22.829
1981	22.344
1982	22.130
1983	21.467
1984	19.819
1985	20.269
1986	20.885
1987	22.130
1988	24.027
1989	25.410
1990	25.683
1991	24.954
1992	22.979
1993	20.989
1994	20.906
1995	21.978
1996	21.787
1997	22.150
1998	23.540
1999	25.211
2000	26.640
2001	26.459
2002	26.684
2003	27.503
2004	28.285
2005	29.387
2006	30.565
2007	30.442
2008	28.455
2009	23.303
2010	22.303
2011	20.572
2012	18.436
2013	17.210
2014	17.894
2015	18.987
2016	18.744
2017	19.401
2018	20.468
2019	20.829
2020	20.470
2021	21.590
2022	21.481
2023	20.310
2024	20.606
2025	21.266
2026	21.435
2027	21.410
2028	21.326
2029	21.240