Year	Percent of GDP (Units)
1980	27.886
1981	23.501
1982	23.956
1983	23.888
1984	24.000
1985	24.050
1986	22.458
1987	18.184
1988	13.971
1989	16.184
1990	16.545
1991	13.494
1992	18.953
1993	25.973
1994	29.959
1995	27.235
1996	23.605
1997	20.852
1998	20.551
1999	18.765
2000	16.481
2001	19.536
2002	18.475
2003	23.070
2004	17.656
2005	18.407
2006	19.862
2007	26.571
2008	31.058
2009	30.004
2010	26.688