Year	Percent
1972-01-01	3.266130
1973-01-01	3.782260
1974-01-01	4.852940
1975-01-01	1.035710
1976-01-01	0.363636
1977-01-01	0.583333
1978-01-01	-0.155242
1979-01-01	7.387100
1980-01-01	0.987500
1981-01-01	5.851100
1982-01-01	1.043560
1983-01-01	2.460230
1984-01-01	4.850810
1985-01-01	4.365810
1986-01-01	2.632140
1987-01-01	0.290440
1988-01-01	3.984850
1989-01-01	8.566530
1990-01-01	8.909270
1991-01-01	7.625000
1992-01-01	5.926470
1993-01-01	4.401520
1994-01-01	3.564390
1995-01-01	2.346770
1996-01-01	1.786760
1997-01-01	1.000000
1998-01-01	1.036760
1999-01-01	1.357010
2000-01-01	3.500000
2001-01-01	1.650000
2002-01-01	0.440000
2003-01-01	0.090000
2004-01-01	0.550000
2005-01-01	0.630000
2006-01-01	1.940000
2007-01-01	2.000000
2008-01-01	0.010000
2009-01-01	0.050000
2010-01-01	0.040000
2011-01-01	0.070000
2012-01-01	-0.200000
2013-01-01	0.010000
2014-01-01	-2.000000
2015-01-01	-1.000000
2016-01-01	-0.900000
2017-01-01	-1.000000