Year	Percent
1973-01-01	8.266666666000040
1974-01-01	12.992610837518700
1975-01-01	8.392370572184480
1976-01-01	5.235042735323740
1977-01-01	9.889519259331040
1978-01-01	8.689745122748390
1979-01-01	7.049999999250090
1980-01-01	6.928226685631900
1981-01-01	7.374781595838090
1982-01-01	7.776798426908510
1983-01-01	4.718168092751540
1984-01-01	1.177460050466690
1985-01-01	1.490321814278770
1986-01-01	0.953606740192035
1987-01-01	0.654844691701642
1988-01-01	1.468132880419150
1989-01-01	3.342033590557940
1990-01-01	9.833635315434000
1991-01-01	9.058188362327570
1992-01-01	-0.545471213788200
1993-01-01	0.382541365165906
1994-01-01	2.534435261707910
1995-01-01	2.686727565824860
1996-01-01	3.553985696842860
1997-01-01	0.682191434707608
1998-01-01	0.129658287674047
1999-01-01	2.990810359231650
2000-01-01	1.812946138870870
2001-01-01	1.300000000000010
2002-01-01	0.888450148074899
2003-01-01	0.961350293542095
2004-01-01	1.248564436798930
2005-01-01	4.142975836310210
2006-01-01	3.057013391667240
2007-01-01	5.484949832775940
2008-01-01	10.582709786514500
2009-01-01	4.609595484477860
2010-01-01	4.496402877697870
2011-01-01	4.839403498709500
2012-01-01	3.255146002872190
2013-01-01	2.682296840850380
2014-01-01	2.908926728586180
2015-01-01	3.271701660921340
2016-01-01	3.198397766583710
2017-01-01	2.171832985100080