Year	Percent of GDP (Units)
1990	39.384
1991	41.514
1992	36.980
1993	33.104
1994	30.902
1995	31.073
1996	28.718
1997	28.332
1998	29.397
1999	31.535
2000	31.048
2001	29.963
2002	29.488
2003	29.530
2004	30.261
2005	31.611
2006	32.497
2007	31.519
2008	30.667
2009	29.455
2010	31.210
2011	30.921
2012	31.082
2013	31.729
2014	31.772
2015	32.816
2016	29.316
2017	28.163
2018	28.990
2019	28.754
2020	28.618
2021	30.420
2022	31.044
2023	31.461
2024	30.638
2025	31.657
2026	32.035
2027	31.482
2028	31.444
2029	31.421