Year	Percent of GDP (Units)
1980	34.853
1981	34.940
1982	30.983
1983	26.669
1984	24.418
1985	21.500
1986	23.432
1987	26.068
1988	28.352
1989	26.523
1990	27.170
1991	26.921
1992	28.177
1993	27.250
1994	31.379
1995	34.291
1996	31.800
1997	34.200
1998	29.004
1999	24.980
2000	27.582
2001	25.491
2002	23.181
2003	22.380
2004	22.357
2005	21.060
2006	22.285
2007	21.396
2008	21.041
2009	21.847
2010	23.890
2011	24.143
2012	25.220
2013	24.030
2014	23.822
2015	21.541
2016	21.507
2017	22.069
2018	21.995
2019	18.190
2020	18.982
2021	16.776
2022	15.230
2023	14.535
2024	16.994
2025	17.406
2026	17.460
2027	17.549
2028	17.647
2029	17.738