Year	Percent
1979-01-01	3.7532300000000003
1980-01-01	3.2650099999999997
1981-01-01	3.6576400000000002
1982-01-01	3.8987500000000000
1983-01-01	2.7131700000000000
1984-01-01	3.0612100000000000
1985-01-01	3.7835699999999997
1986-01-01	6.6058100000000010
1987-01-01	12.8531000000000000
1988-01-01	28.7343000000000000
1989-01-01	43.6300000000000000
1990-01-01	34.6024000000000000
1991-01-01	24.1129000000000000
1992-01-01	27.7617000000000000
1993-01-01	41.7976000000000000
1994-01-01	55.1695000000000000
1995-01-01	44.0474000000000000
1996-01-01	29.8866000000000000
1997-01-01	28.6465000000000000
1998-01-01	37.4768000000000000
1999-01-01	97.8648000000000000
2000-01-01	116.2550000000000000
2001-01-01	76.8287000000000000
2002-01-01	79.5569000000000000
2003-01-01	79.0138000000000000
2004-01-01	65.9950000000000000
2005-01-01	99.8842000000000000
2006-01-01	130.6450000000000000
2007-01-01	146.8560000000000000
2008-01-01	141.9980000000000000
2009-01-01	150.4380000000000000
2010-01-01	160.4479999999999800
2011-01-01	152.3179999999999800
2012-01-01	143.1650000000000000
2013-01-01	113.8140000000000000
2014-01-01	95.0656000000000000
2015-01-01	110.1229999999999900
2016-01-01	120.2370000000000100
2017-01-01	120.0540000000000000