Year	Percent of GDP (Units)
1980	21.993
1981	21.267
1982	20.392
1983	24.001
1984	21.975
1985	21.676
1986	17.539
1987	22.512
1988	18.207
1989	17.392
1990	17.337
1991	15.922
1992	14.093
1993	16.181
1994	16.586
1995	18.897
1996	19.157
1997	19.682
1998	19.935
1999	20.026
2000	19.738
2001	18.077
2002	18.879
2003	20.354
2004	21.581
2005	20.899
2006	22.248
2007	22.227
2008	22.715
2009	22.508
2010	22.992
2011	23.394
2012	22.968
2013	20.287
2014	20.472
2015	21.137
2016	22.070
2017	22.095
2018	21.413
2019	21.823
2020	22.607
2021	21.275
2022	21.497
2023	24.446
2024	23.867
2025	23.367
2026	23.084
2027	22.921
2028	22.839
2029	22.832