Year	Percent of GDP
1960-01-01	0.15
1961-01-01	0.18
1962-01-01	0.17
1963-01-01	0.02
1964-01-01	-0.10
1965-01-01	-0.18
1966-01-01	0.11
1967-01-01	0.38
1968-01-01	0.74
1969-01-01	0.79
1970-01-01	0.82
1971-01-01	0.98
1972-01-01	1.03
1973-01-01	1.11
1974-01-01	1.40
1975-01-01	1.49
1976-01-01	2.11
1977-01-01	2.33
1978-01-01	2.28
1979-01-01	2.08
1980-01-01	1.71
1981-01-01	1.66
1982-01-01	1.35
1983-01-01	1.55
1984-01-01	1.63
1985-01-01	2.06
1986-01-01	1.84
1987-01-01	1.75
1988-01-01	1.16
1989-01-01	0.96
1990-01-01	1.34
1991-01-01	1.30
1992-01-01	1.34
1993-01-01	1.59
1994-01-01	1.58
1995-01-01	1.94
1996-01-01	1.93
1997-01-01	1.92
1998-01-01	1.64
1999-01-01	1.51
2000-01-01	1.39
2001-01-01	1.60
2002-01-01	1.56
2003-01-01	1.82
2004-01-01	2.15
2005-01-01	2.43
2006-01-01	2.86
2007-01-01	3.51
2008-01-01	3.95
2009-01-01	3.92
2010-01-01	4.18
2011-01-01	4.72
2012-01-01	4.49
2013-01-01	4.57