Year	Percent
1960-01-01	0.332829047091756
1961-01-01	0.693606754935318
1962-01-01	-3.003076587907820
1963-01-01	0.746645708135420
1964-01-01	3.660982948854650
1965-01-01	14.839004461624100
1966-01-01	9.036440658176320
1967-01-01	0.701897484353739
1968-01-01	-1.675759424569110
1969-01-01	3.409820282437420
1970-01-01	3.762898595805360
1971-01-01	3.140421713941980
1972-01-01	2.102363346101120
1973-01-01	5.112184039087570
1974-01-01	10.024317751648400
1975-01-01	9.669695481512440
1976-01-01	10.317415887741300
1977-01-01	12.732162792989100
1978-01-01	11.078100382614000
1979-01-01	9.904360512311260
1980-01-01	20.819224932421900
1981-01-01	10.317284224539500
1982-01-01	14.823008849557700
1983-01-01	16.079873883342000
1984-01-01	17.036366379960800
1985-01-01	12.106756059824700
1986-01-01	23.864289821736600
1987-01-01	19.693593314763000
1988-01-01	17.663486153130000
1989-01-01	21.261867088607800
1990-01-01	16.756374707769100
1991-01-01	19.748544819557800
1992-01-01	13.637424171721800
1993-01-01	12.089792286897700
1994-01-01	8.154231285871010
1995-01-01	15.742230502159600
1996-01-01	7.187103697199910
1997-01-01	4.625605788264400
1998-01-01	3.872575464274920
1999-01-01	3.079499126383280
2000-01-01	2.683805353485480
2001-01-01	2.269757204759530
2002-01-01	2.737238550003340
2003-01-01	4.507776363193070
2004-01-01	11.270619332052000
2005-01-01	4.869396968719870
2006-01-01	7.644526445264300
2007-01-01	9.318969057992330
2008-01-01	18.316831683168400
2009-01-01	11.763495438644400
2010-01-01	11.265188265318600
2011-01-01	10.053916904535400
2012-01-01	7.118155619596540
2013-01-01	9.421576540220590
2014-01-01	10.144571203776600
2015-01-01	10.362069735256000
2016-01-01	13.809668284789700
2017-01-01	29.501932732038900