Year	Percent of GDP (Units)
1981	49.951
1982	33.933
1983	42.213
1984	39.314
1985	54.142
1986	48.721
1987	47.457
1988	45.343
1989	46.809
1990	35.846
1991	30.806
1992	34.456
1993	35.213
1994	37.875
1995	38.610
1996	37.885
1997	37.829
1998	31.105
1999	40.172
2000	43.030
2001	50.300
2002	39.305
2003	34.724
2004	30.998
2005	36.431
2006	33.428
2007	33.194
2008	36.101
2009	39.307
2010	42.025
2011	36.828
2012	35.776
2013	33.038
2014	29.125
2015	27.654
2016	30.367
2017	30.798
2018	31.692
2019	24.248
2020	30.948
2021	36.629
2022	32.088
2023	29.104
2024	28.646
2025	29.575
2026	30.283
2027	30.756
2028	31.056
2029	31.491