Year	Percent
1971-01-01	14.599292869816400
1972-01-01	20.940994987157000
1973-01-01	18.239795918821800
1974-01-01	24.424667385920400
1975-01-01	18.611372010313100
1976-01-01	14.868733630047700
1977-01-01	14.959168522751100
1978-01-01	11.783251231892300
1979-01-01	12.480169222314000
1980-01-01	13.571540510808800
1981-01-01	10.576790396091800
1982-01-01	-0.912646675358539
1983-01-01	6.052631578947380
1984-01-01	4.094292803970150
1985-01-01	0.834326579260983
1986-01-01	0.236406619385390
1987-01-01	2.594339622641370
1988-01-01	1.839080459770120
1989-01-01	1.580135440180570
1990-01-01	3.888888888889150
1991-01-01	1.986754966887290
1992-01-01	3.246753246753250
1993-01-01	1.383647798742150
1994-01-01	1.736972704714630
1995-01-01	-0.243902439024464
1996-01-01	-1.100244498777450
1997-01-01	0.618046971569893
1998-01-01	2.579852579852450
1999-01-01	6.347305389221570
2000-01-01	6.268768768768770
2001-01-01	5.969622041681560
2002-01-01	0.174999999999919
2003-01-01	3.302553864070890
2004-01-01	3.857303913673990
2005-01-01	0.907187718073947
2006-01-01	-0.353465498693752
2007-01-01	5.320600272851360
2008-01-01	36.964758287528800
2009-01-01	31.754440774417800
2010-01-01	-2.404638751082230
2011-01-01	2.559267722309500
2012-01-01	7.110370623264020
2013-01-01	4.338938483291040
2014-01-01	1.385834545812620
2015-01-01	4.041944107256230
2016-01-01	-1.015481916976420
2017-01-01	2.856795755684490