Year	Percent of GDP (Units)
1980	49.257
1981	44.078
1982	42.744
1983	40.706
1984	45.339
1985	41.512
1986	36.289
1987	34.963
1988	36.510
1989	42.291
1990	36.643
1991	34.434
1992	38.195
1993	32.590
1994	33.052
1995	26.518
1996	24.177
1997	23.887
1998	18.898
1999	19.640
2000	20.320
2001	17.664
2002	20.268
2003	19.525
2004	21.964
2005	22.343
2006	24.505
2007	24.245
2008	28.803
2009	22.771
2010	23.849
2011	18.748
2012	15.988
2013	12.820
2014	13.410
2015	13.135
2016	17.287
2017	20.717
2018	19.217
2019	19.726
2020	20.852
2021	19.319
2022	21.276
2023	22.880
2024	22.239
2025	22.173
2026	22.311
2027	22.471
2028	22.688
2029	22.933