Year	Percent
1966-01-01	4.436860067690860
1967-01-01	-1.089324618742560
1968-01-01	6.057268722225240
1969-01-01	4.023883697331200
1970-01-01	-0.199650611430204
1971-01-01	3.850962740444590
1972-01-01	3.828557669173270
1973-01-01	6.006493506753080
1974-01-01	15.722307299093700
1975-01-01	15.709874598823300
1976-01-01	6.856551573645400
1977-01-01	6.834514041364860
1978-01-01	23.895620646930300
1979-01-01	36.540756998092600
1980-01-01	2.498519500301630
1981-01-01	12.167394348793800
1982-01-01	5.868096357226600
1983-01-01	8.151231356226330
1984-01-01	14.316869788325800
1985-01-01	3.804286836494260
1986-01-01	1.675675675675450
1987-01-01	7.113237639553400
1988-01-01	4.486797697041780
1989-01-01	11.661599847995800
1990-01-01	7.002169566511260
1991-01-01	8.996938734943250
1992-01-01	1.823333333333100
1993-01-01	9.679346580679280
1994-01-01	14.852814983397000
1995-01-01	19.263253638253800
1996-01-01	26.436781609195100
1997-01-01	31.111589831969400
1998-01-01	12.500410765337800
1999-01-01	3.385424273404550
2000-01-01	24.432024210215100
2001-01-01	9.296187713418850
2002-01-01	-1.365680053280610
2003-01-01	10.647464565830600
2004-01-01	8.176429374820590
2005-01-01	13.252069918822300
2006-01-01	2.745420002142460
2007-01-01	8.412062857725410
2008-01-01	24.406951035391400
2009-01-01	10.555435529952900
2010-01-01	6.493265914739960
2011-01-01	9.592166059796710
2012-01-01	18.161045306545100
2013-01-01	7.937958074924120
2014-01-01	4.405352341852900
2015-01-01	5.544688912597860
2016-01-01	5.557689614009650
2017-01-01	16.052535303039200