Year	Percent of GDP (Units)
1980	24.870
1981	23.533
1982	21.722
1983	17.569
1984	20.024
1985	23.252
1986	23.012
1987	24.218
1988	28.702
1989	31.399
1990	31.291
1991	29.745
1992	29.206
1993	29.157
1994	30.398
1995	27.989
1996	26.022
1997	28.832
1998	28.303
1999	28.898
2000	28.204
2001	19.590
2002	20.839
2003	22.377
2004	23.051
2005	21.421
2006	25.233
2007	25.640
2008	25.009
2009	23.450
2010	26.745
2011	23.628
2012	24.057
2013	21.527
2014	19.069
2015	17.492
2016	17.273
2017	17.668
2018	18.873
2019	19.436
2020	18.215
2021	19.793
2022	19.927
2023	19.265
2024	19.112
2025	18.765
2026	18.458
2027	18.255
2028	18.072
2029	17.919