Year	Percent
1960-01-01	0.7902058179600540
1961-01-01	2.4307939100916000
1962-01-01	2.6778596874278600
1963-01-01	2.9316184705135800
1964-01-01	3.3240331601812700
1965-01-01	-0.6650000005833750
1966-01-01	0.1828828376214980
1967-01-01	1.2083403113442100
1968-01-01	4.0938914310683400
1969-01-01	2.6293408365833300
1970-01-01	4.6522974930315600
1971-01-01	3.0830484140870600
1972-01-01	4.6011256928086400
1973-01-01	15.2140342204182000
1974-01-01	30.0736292803636000
1975-01-01	17.3692020226552000
1976-01-01	3.4858333329170200
1977-01-01	4.1744844300915100
1978-01-01	6.0146714388071400
1979-01-01	9.1835097849377500
1980-01-01	18.1263898816154000
1981-01-01	37.0572006829526000
1982-01-01	90.1227133045357000
1983-01-01	32.6205621750783000
1984-01-01	11.9506609083384000
1985-01-01	15.0517585031092000
1986-01-01	11.8367507649258000
1987-01-01	16.8466527583525000
1988-01-01	20.8263232222500000
1989-01-01	16.5099541727575000
1990-01-01	19.0441800896161000
1991-01-01	28.7093208307046000
1992-01-01	21.7882542513480000
1993-01-01	9.7814464419841900
1994-01-01	13.5342450979728000
1995-01-01	23.1892367083284000
1996-01-01	17.5224945702762000
1997-01-01	13.2314698699761000
1998-01-01	11.6660934849641000
1999-01-01	10.0458837715520000
2000-01-01	10.9925242865818000
2001-01-01	11.2269755117739000
2002-01-01	9.1648157921404900
2003-01-01	9.4475648100771300
2004-01-01	12.3150309270856000
2005-01-01	13.7979752796936000
2006-01-01	11.4705307105426000
2007-01-01	9.3573313869284100
2008-01-01	13.4233563461578000
2009-01-01	7.8438258407443600
2010-01-01	5.6602306512419200
2011-01-01	4.8830124813682700
2012-01-01	4.5040676919901700
2013-01-01	5.2202248525703200
2014-01-01	4.5193464874844900
2015-01-01	0.8020805602118950
2016-01-01	-0.0173127740812815
2017-01-01	1.6257233038991700