Year	Percent
1963-01-01	7.158333332499920
1964-01-01	3.328408119008310
1965-01-01	2.438473695959210
1966-01-01	3.644111380967690
1967-01-01	1.977741546826660
1968-01-01	2.335604059298410
1969-01-01	2.975139247396480
1970-01-01	3.812664907667910
1971-01-01	3.863260897015670
1972-01-01	3.487091643478860
1973-01-01	6.207141168143370
1974-01-01	12.072804185661900
1975-01-01	28.452942637233600
1976-01-01	20.171564463972100
1977-01-01	13.852569086284200
1978-01-01	10.764169097680700
1979-01-01	7.952698537514440
1980-01-01	12.340359256560300
1981-01-01	8.706502148930030
1982-01-01	16.685796879749200
1983-01-01	10.671936758893300
1984-01-01	5.857142857142960
1985-01-01	7.354925775978330
1986-01-01	6.285355122564500
1987-01-01	-0.946185688941443
1988-01-01	-8.776119402985110
1989-01-01	6.740837696334980
1990-01-01	7.725321888412080
1991-01-01	-11.686112692088900
1992-01-01	-9.542913303365730
1993-01-01	0.533746556474219
1994-01-01	36.116245696298500
1995-01-01	9.646531040796160
1996-01-01	0.689693377281650
1997-01-01	3.973450075453010
1998-01-01	1.448738542945980
1999-01-01	-1.936603976036280
2000-01-01	0.504920025834855
2001-01-01	2.137620527014660
2002-01-01	0.036682889397120
2003-01-01	2.235353135515380
2004-01-01	0.408205307439259
2005-01-01	3.708333333333040
2006-01-01	-1.409401366009810
2007-01-01	5.030318836799530
2008-01-01	5.264301455752850
2009-01-01	1.885707545779180
2010-01-01	1.461544027204700
2011-01-01	1.263317078374200
2012-01-01	2.652418286956230
2013-01-01	0.505441058915663
2014-01-01	4.690457518262820
2015-01-01	-0.338795188753357
2016-01-01	2.106707127840510