Year	Percent of GDP (Units)
1980	5.005
1981	6.009
1982	5.170
1983	5.427
1984	8.091
1985	5.916
1986	7.301
1987	5.564
1988	10.196
1989	8.191
1990	7.151
1991	4.951
1992	6.554
1993	7.484
1994	9.228
1995	13.486
1996	12.230
1997	10.034
1998	12.527
1999	7.396
2000	15.662
2001	19.050
2002	15.578
2003	16.425
2004	24.312
2005	18.382
2006	12.874
2007	16.406
2008	18.627
2009	15.653
2010	23.476
2011	31.463
2012	30.629
2013	28.109
2014	30.319
2015	31.396
2016	31.093
2017	30.256
2018	32.330
2019	29.913
2020	26.582
2021	25.168
2022	21.293
2023	19.340
2024	16.930
2025	17.377
2026	18.764
2027	18.988
2028	19.020
2029	18.312