Year	Percent
1966-01-01	2.134471718522380
1967-01-01	4.258098223092910
1968-01-01	3.257328990244620
1969-01-01	-0.194127638923884
1970-01-01	1.628981278393490
1971-01-01	5.789473684984030
1972-01-01	5.088195386488140
1973-01-01	14.331826984997900
1974-01-01	24.392998306179800
1975-01-01	16.159782115370700
1976-01-01	22.495766575964000
1977-01-01	17.731120894237300
1978-01-01	15.785537594198700
1979-01-01	2.205991951167660
1980-01-01	3.869525059415030
1981-01-01	11.344596808397500
1982-01-01	8.885713084714600
1983-01-01	2.972399150750710
1984-01-01	0.322399250235353
1985-01-01	-2.635969302969720
1986-01-01	-2.296093214195590
1987-01-01	-1.745001753770600
1988-01-01	0.303435966086571
1989-01-01	1.485897321825710
1990-01-01	0.929335437489111
1991-01-01	0.764419735927607
1992-01-01	-0.172413793103325
1993-01-01	2.538860103626960
1994-01-01	0.816910897759777
1995-01-01	2.704034750647020
1996-01-01	-0.452227382530316
1997-01-01	2.431551339559260
1998-01-01	-0.366533864541796
1999-01-01	-1.287587971849100
2000-01-01	-0.704852953090751
2001-01-01	-1.207571801566610
2002-01-01	-0.495540138751155
2003-01-01	1.593625498007840
2004-01-01	2.352941176470630
2005-01-01	2.586206896551730
2006-01-01	2.007469654528490
2007-01-01	3.256666666667020
2008-01-01	3.526003163637220
2009-01-01	2.795512835504110
2010-01-01	1.961884683346240
2011-01-01	-0.401486988847566
2012-01-01	2.758286055538970
2013-01-01	3.301006138534740
2014-01-01	2.646291464778230
2015-01-01	1.839519875035990
2016-01-01	2.800594697504820
2017-01-01	1.387343760225100