Year	Percent
1965-01-01	4.201860365894430
1966-01-01	3.211573978975550
1967-01-01	0.815190376680800
1968-01-01	0.956513164485512
1969-01-01	3.828872826836600
1970-01-01	2.878645343187940
1971-01-01	5.385881492434950
1972-01-01	5.622559652774800
1973-01-01	6.120101864647780
1974-01-01	22.100944418778000
1975-01-01	8.191212832159320
1976-01-01	4.986815118625650
1977-01-01	3.108952891284320
1978-01-01	6.528446922617990
1979-01-01	14.055592255551500
1980-01-01	18.217865894675500
1981-01-01	30.538177432771200
1982-01-01	31.789704651053500
1983-01-01	19.328338591095000
1984-01-01	9.856620954338860
1985-01-01	10.556483957361900
1986-01-01	14.497332103912900
1987-01-01	14.993135132250200
1988-01-01	26.853797141381200
1989-01-01	9.012995945554970
1990-01-01	11.784483832135700
1991-01-01	8.592647604901920
1992-01-01	14.512378607577200
1993-01-01	10.008361204014000
1994-01-01	38.941790898924000
1995-01-01	49.080210059078500
1996-01-01	19.756354543977600
1997-01-01	4.486382617373980
1998-01-01	6.208016086633200
1999-01-01	9.929533993487820
2000-01-01	11.859684500028000
2001-01-01	7.536284628215050
2002-01-01	16.498525531585100
2003-01-01	-1.704004796162740
2004-01-01	13.955801803320500
2005-01-01	18.363824646893300
2006-01-01	10.765637155487000
2007-01-01	10.287966318766600
2008-01-01	9.296508393811050
2009-01-01	8.954218023929080
2010-01-01	9.247321736441270
2011-01-01	9.482540485829990
2012-01-01	5.713844341910480
2013-01-01	5.826429444519890
2014-01-01	6.080595482546210
2015-01-01	7.404002032471110
2016-01-01	6.654801865327010
2017-01-01	8.284223644466970