Year	Percent of GDP (Units)
1980	20.346
1981	18.197
1982	17.618
1983	16.797
1984	15.940
1985	13.950
1986	13.977
1987	15.698
1988	15.063
1989	12.465
1990	11.354
1991	11.895
1992	13.431
1993	17.301
1994	17.509
1995	16.399
1996	17.403
1997	18.415
1998	18.551
1999	15.557
2000	15.337
2001	13.640
2002	9.965
2003	12.877
2004	17.551
2005	18.888
2006	18.680
2007	20.099
2008	19.573
2009	16.053
2010	17.706
2011	18.398
2012	16.502
2013	17.306
2014	17.263
2015	17.071
2016	17.663
2017	18.213
2018	16.614
2019	14.100
2020	16.598
2021	18.208
2022	18.134
2023	18.385
2024	17.098
2025	17.928
2026	18.909
2027	20.280
2028	20.979
2029	21.061