Year	Percent
1960-01-01	11.533152575619600
1961-01-01	7.561493071838990
1962-01-01	5.879331422252980
1963-01-01	-0.706357214552415
1964-01-01	10.181818181818100
1965-01-01	2.860286028602720
1966-01-01	6.951871657754030
1967-01-01	11.199999999000100
1968-01-01	5.470623501623010
1969-01-01	2.209748472513230
1970-01-01	3.955509210997700
1971-01-01	3.674614305750340
1972-01-01	6.511544011543630
1973-01-01	31.486028789161900
1974-01-01	62.836075602923800
1975-01-01	7.976746025468660
1976-01-01	4.494011647072180
1977-01-01	8.107255520504100
1978-01-01	10.355672275719200
1979-01-01	19.719716778799900
1980-01-01	47.241650101842600
1981-01-01	32.133601113342400
1982-01-01	123.535718565329000
1983-01-01	275.586283560362000
1984-01-01	1281.349941744860000
1985-01-01	11749.639632143900000
1986-01-01	276.335967563202000
1987-01-01	14.578698448919100
1988-01-01	16.002091054939100
1989-01-01	15.173468112573100
1990-01-01	17.118774604824000
1991-01-01	21.447069817114100
1992-01-01	12.060323601829000
1993-01-01	8.527876956880030
1994-01-01	7.874044214674370
1995-01-01	10.193206763074600
1996-01-01	12.425486618004800
1997-01-01	4.708444360281980
1998-01-01	7.673228956750820
1999-01-01	2.159516268355970
2000-01-01	4.608229988725960
2001-01-01	1.589653778795690
2002-01-01	0.928258851611065
2003-01-01	3.337274996715320
2004-01-01	4.437380801017240
2005-01-01	5.393231068906640
2006-01-01	4.285549266489620
2007-01-01	8.706247230837370
2008-01-01	14.000407581006700
2009-01-01	3.349369825513980
2010-01-01	2.501567533674960
2011-01-01	9.883001462481720
2012-01-01	4.518812388021500
2013-01-01	5.735205887034570
2014-01-01	5.764576457645740
2015-01-01	4.060963726145030
2016-01-01	3.625239367858400
2017-01-01	2.822185556542720