Year	Percent of GDP (Units)
1980	3.966
1981	7.583
1982	10.510
1983	12.655
1984	10.671
1985	15.415
1986	13.812
1987	12.024
1988	12.182
1989	9.297
1990	11.325
1991	11.157
1992	8.138
1993	10.744
1994	10.349
1995	8.798
1996	8.837
1997	7.724
1998	8.673
1999	21.192
2000	15.999
2001	16.603
2002	14.777
2003	16.506
2004	16.195
2005	15.782
2006	16.626
2007	17.163
2008	14.506
2009	15.145
2010	16.043
2011	13.684
2012	14.717
2013	14.567
2014	15.630
2015	15.821
2016	13.952
2017	13.661
2018	13.965
2019	14.101
2020	14.905
2021	15.163
2022	13.943
2023	13.507
2024	14.071
2025	15.197
2026	15.685
2027	15.955
2028	16.188
2029	16.185