Year	Percent
1965-01-01	26.44478484901730
1966-01-01	13.23788546265400
1967-01-01	-8.42248589780285
1968-01-01	7.89473684210538
1969-01-01	7.31707316260120
1970-01-01	3.03030303053267
1971-01-01	9.55882353746776
1972-01-01	10.06711409395950
1973-01-01	17.68292682317110
1974-01-01	18.13471502684630
1975-01-01	29.82456140481680
1976-01-01	56.08108108297560
1977-01-01	116.45021645363900
1978-01-01	73.09166666734300
1979-01-01	54.44128833456170
1980-01-01	50.07013934363640
1981-01-01	116.50360399654100
1982-01-01	22.29556640808930
1983-01-01	122.87451457259200
1984-01-01	39.66531379472670
1985-01-01	10.30544066982950
1986-01-01	24.56541607650010
1987-01-01	39.81506787753630
1988-01-01	31.35926762647680
1989-01-01	25.22369202958250
1990-01-01	37.25906648556710
1991-01-01	18.03143900898490
1992-01-01	10.05611674488410
1993-01-01	24.95984247424970
1994-01-01	24.87025543695760
1995-01-01	59.46155369914450
1996-01-01	46.56101967622830
1997-01-01	27.88520864075280
1998-01-01	14.62416666666740
1999-01-01	12.40866891071460
2000-01-01	25.19321937432470
2001-01-01	32.90540889600690
2002-01-01	14.81624006374780
2003-01-01	26.67494972611720
2004-01-01	12.62457406293850
2005-01-01	15.11818572279450
2006-01-01	10.91516996720420
2007-01-01	10.73272807047150
2008-01-01	16.52214331433440
2009-01-01	19.25071443051530
2010-01-01	10.70756812187110
2011-01-01	8.72683683123394
2012-01-01	7.12635005995041
2013-01-01	11.66619230717290
2014-01-01	15.48961603333190
2015-01-01	17.14996950078770
2016-01-01	17.45463470708670
2017-01-01	12.37192155070480