Year	Percent of GDP (Units)
1980	34.031
1981	32.160
1982	31.967
1983	32.477
1984	32.298
1985	32.270
1986	32.614
1987	32.586
1988	34.816
1989	36.716
1990	39.553
1991	41.234
1992	38.738
1993	37.654
1994	38.513
1995	38.950
1996	39.423
1997	37.189
1998	27.779
1999	31.013
2000	32.894
2001	31.603
2002	31.093
2003	32.280
2004	32.550
2005	32.508
2006	32.993
2007	33.097
2008	33.667
2009	29.400
2010	32.552
2011	33.319
2012	31.317
2013	29.885
2014	29.790
2015	29.529
2016	30.143
2017	32.288
2018	31.487
2019	31.495
2020	31.885
2021	32.327
2022	33.181
2023	32.129
2024	31.349
2025	31.032
2026	30.765
2027	30.528
2028	30.336
2029	30.195