Year	Percent of GDP (Units)
1980	44.026
1981	27.252
1982	28.952
1983	24.427
1984	23.546
1985	22.048
1986	21.481
1987	21.184
1988	22.019
1989	20.523
1990	25.938
1991	25.902
1992	31.543
1993	30.025
1994	31.499
1995	30.518
1996	30.116
1997	26.923
1998	27.360
1999	28.445
2000	29.277
2001	23.282
2002	23.895
2003	23.197
2004	26.336
2005	28.026
2006	30.207
2007	30.213
2008	29.698
2009	28.411
2010	30.352
2011	33.364
2012	39.056
2013	33.249
2014	32.310
2015	34.276
2016	36.453
2017	39.727
2018	38.057
2019	34.109
2020	32.979
2021	36.744
2022	34.391