Year	Percent
1960-01-01	5.444327361872380
1961-01-01	6.279147234775130
1962-01-01	5.265632346217320
1963-01-01	-2.694655352327280
1964-01-01	0.856793145737534
1965-01-01	4.103458738116180
1966-01-01	9.690346083751170
1967-01-01	-3.726336765142130
1968-01-01	-0.476059059060839
1969-01-01	10.155979202822000
1970-01-01	13.757079924792900
1971-01-01	15.999114848223500
1972-01-01	3.457649752014970
1973-01-01	5.402664453942250
1974-01-01	12.674393177432900
1975-01-01	33.964188322177700
1976-01-01	24.299999999999700
1977-01-01	15.087834057268800
1978-01-01	21.709245741666400
1979-01-01	11.709730621211700
1980-01-01	9.972261990014290
1981-01-01	20.812822912194900
1982-01-01	7.697747247142510
1983-01-01	23.212331551155900
1984-01-01	17.820533286084200
1985-01-01	7.435344827586330
1986-01-01	5.717151454363030
1987-01-01	11.290322580645200
1988-01-01	54.511224779767200
1989-01-01	50.466688123591500
1990-01-01	7.364400305576980
1991-01-01	13.006973103742800
1992-01-01	44.588842715023000
1993-01-01	57.165252834921700
1994-01-01	57.031708911965900
1995-01-01	72.835502297263700
1996-01-01	29.268292682927200
1997-01-01	8.529874213836340
1998-01-01	9.996378123868050
1999-01-01	6.618373394797550
2000-01-01	6.933292155651600
2001-01-01	18.873646209386300
2002-01-01	12.876579203109900
2003-01-01	14.031783613143700
2004-01-01	14.998033818325100
2005-01-01	17.863493366160500
2006-01-01	8.239526517349440
2007-01-01	5.382223651763660
2008-01-01	11.577983518160600
2009-01-01	11.537672747305400
2010-01-01	13.720201844440600
2011-01-01	10.840027541886600
2012-01-01	12.217781735103100
2013-01-01	8.475827285028930
2014-01-01	8.062485824449990
2015-01-01	9.009387183267810
2016-01-01	15.675340552623400
2017-01-01	16.523539980216900