Year	Percent of GDP (Units)
1980	17.387
1981	17.390
1982	17.501
1983	16.908
1984	18.156
1985	20.214
1986	19.904
1987	21.918
1988	22.282
1989	23.631
1990	25.173
1991	23.153
1992	23.217
1993	23.592
1994	25.723
1995	25.711
1996	24.479
1997	26.342
1998	25.228
1999	29.934
2000	25.108
2001	30.610
2002	31.483
2003	33.157
2004	34.748
2005	36.222
2006	37.981
2007	40.658
2008	36.095
2009	36.392
2010	36.928
2011	35.402
2012	33.541
2013	32.286
2014	32.954
2015	31.067
2016	29.547
2017	29.147
2018	30.228
2019	29.230
2020	29.820
2021	30.894
2022	31.027
2023	31.781
2024	31.933
2025	31.592
2026	31.158
2027	30.768
2028	30.281
2029	29.778