Year	Percent
1981-01-01	42.6229527318245000
1982-01-01	30.1125435950715000
1983-01-01	40.2134918436936000
1984-01-01	53.6719669102483000
1985-01-01	79.4063811481874000
1986-01-01	95.8865052101643000
1987-01-01	132.0727210148310000
1988-01-01	198.7537128620230000
1989-01-01	1281.4434940487600000
1990-01-01	552.0835289143250000
1991-01-01	114.8329355897470000
1992-01-01	209.9337311868220000
1993-01-01	31.7621306305932000
1994-01-01	20.9918180471499000
1995-01-01	13.4637296178669000
1996-01-01	9.8644506154685200
1997-01-01	8.3596799070429500
1998-01-01	7.8911668285669000
1999-01-01	6.1555875445155900
2000-01-01	8.9117441865876400
2001-01-01	8.3796658749220500
2002-01-01	7.4807777070375600
2003-01-01	5.5441642175289800
2004-01-01	3.5929759424951300
2005-01-01	2.4515013231647400
2006-01-01	2.4579244419586400
2007-01-01	3.6574956328410400
2008-01-01	5.6474238057393400
2009-01-01	0.8392622467938400
2010-01-01	1.8011702213713600
2011-01-01	1.8028517194190700
2012-01-01	2.5974138603901000
2013-01-01	1.7692008588189600
2014-01-01	0.1993438265708490
2015-01-01	-0.5255522858208380
2016-01-01	-0.0549995416704911
2017-01-01	1.4291074331929700