Year	Percent of GDP (Units)
1980	45.976
1981	46.550
1982	47.401
1983	48.204
1984	48.938
1985	49.339
1986	48.704
1987	49.304
1988	48.079
1989	47.691
1990	47.698
1991	48.409
1992	47.990
1993	48.846
1994	49.202
1995	49.700
1996	50.975
1997	50.878
1998	50.546
1999	51.027
2000	50.334
2001	50.339
2002	49.635
2003	49.255
2004	49.394
2005	49.939
2006	50.432
2007	49.929
2008	50.033
2009	49.977
2010	49.995
2011	51.136
2012	52.126
2013	53.144
2014	53.309
2015	53.172
2016	53.049
2017	53.545
2018	53.356
2019	52.287
2020	52.363
2021	52.637
2022	53.524
2023	51.850
2024	52.036
2025	51.869
2026	51.827
2027	51.806
2028	51.809
2029	51.812