Year	Percent of GDP (Units)
1990	23.180
1991	20.414
1992	18.692
1993	20.140
1994	20.419
1995	22.628
1996	28.075
1997	28.365
1998	28.605
1999	28.674
2000	26.377
2001	28.570
2002	30.859
2003	31.901
2004	31.481
2005	29.327
2006	30.927
2007	31.349
2008	34.800
2009	38.667
2010	33.175
2011	31.978
2012	29.806
2013	27.028
2014	26.741
2015	27.279
2016	28.153
2017	28.626
2018	29.445
2019	29.718
2020	32.630
2021	30.096
2022	29.797
2023	30.866
2024	30.980
2025	30.824
2026	30.610
2027	30.293
2028	30.278
2029	30.256