Year	Percent of GDP (Units)
1981	19.074
1982	17.086
1983	17.636
1984	18.555
1985	17.663
1986	15.096
1987	14.567
1988	14.630
1989	13.991
1990	16.815
1991	15.551
1992	15.280
1993	13.505
1994	13.529
1995	12.548
1996	12.470
1997	14.216
1998	13.185
1999	14.181
2000	13.433
2001	17.745
2002	16.353
2003	17.099
2004	17.573
2005	17.860
2006	18.868
2007	17.782
2008	19.448
2009	15.382
2010	15.644
2011	17.010
2012	17.249
2013	16.864
2014	16.560
2015	14.878
2016	14.360
2017	14.180
2018	14.921
2019	14.268
2020	12.352
2021	13.719
2022	15.170
2023	14.987
2024	15.237
2025	15.328
2026	15.358
2027	15.395
2028	15.457
2029	15.507