Year	Percent of GDP (Units)
1988	45.343
1989	30.861
1990	27.878
1991	29.985
1992	28.792
1993	27.282
1994	26.481
1995	26.735
1996	28.161
1997	27.411
1998	27.251
1999	24.826
2000	24.087
2001	25.222
2002	24.565
2003	23.457
2004	23.343
2005	27.908
2006	32.667
2007	26.775
2008	28.197
2009	33.398
2010	31.521
2011	30.402
2012	29.731
2013	31.571
2014	32.763
2015	33.894
2016	31.076
2017	30.707
2018	29.505
2019	30.495
2020	35.084
2021	31.143
2022	27.507
2023	29.781
2024	28.958
2025	29.609
2026	28.975
2027	28.774
2028	28.444
2029	28.262