Year	Percent of GDP (Units)
1980	22.386
1981	25.296
1982	19.924
1983	20.221
1984	20.960
1985	21.534
1986	21.680
1987	22.178
1988	23.506
1989	23.610
1990	21.304
1991	19.341
1992	18.377
1993	18.475
1994	19.516
1995	19.380
1996	18.928
1997	21.217
1998	21.045
1999	20.684
2000	20.614
2001	19.671
2002	19.739
2003	20.467
2004	21.383
2005	22.632
2006	23.595
2007	23.908
2008	24.072
2009	21.959
2010	23.482
2011	24.151
2012	24.868
2013	24.908
2014	24.871
2015	23.822
2016	22.761
2017	23.550
2018	23.377
2019	23.042
2020	22.675
2021	24.314
2022	25.364
2023	23.903
2024	23.575
2025	23.561
2026	23.603
2027	23.587
2028	23.546
2029	23.510