Year	Percent
1989-01-01	6.21051
1990-01-01	10.72270
1991-01-01	12.47530
1992-01-01	9.48011
1993-01-01	9.18490
1994-01-01	11.28720
1995-01-01	11.84320
1996-01-01	13.79370
1997-01-01	19.21000
1998-01-01	38.25460
1999-01-01	96.20580
2000-01-01	109.89000
2001-01-01	60.86670
2002-01-01	50.73350
2003-01-01	46.21710
2004-01-01	50.30030
2005-01-01	54.52210
2006-01-01	63.30280
2007-01-01	75.41120
2008-01-01	53.31630
2009-01-01	29.83960
2010-01-01	29.49370
2011-01-01	18.24970
2012-01-01	15.44240
2013-01-01	26.76570
2014-01-01	29.02160
2015-01-01	22.50970
2016-01-01	20.34410
2017-01-01	22.04140