Year	Percent
1980-01-01	9.71045
1981-01-01	12.43180
1982-01-01	12.91910
1983-01-01	12.45330
1984-01-01	13.15310
1985-01-01	16.56450
1986-01-01	16.41510
1987-01-01	18.31640
1988-01-01	18.44570
1989-01-01	19.88510
1990-01-01	19.42290
1991-01-01	20.42410
1992-01-01	18.90630
1993-01-01	21.13160
1994-01-01	23.68920
1995-01-01	23.96070
1996-01-01	24.24060
1997-01-01	26.48790
1998-01-01	31.37930
1999-01-01	32.06630
2000-01-01	38.53910
2001-01-01	43.42760
2002-01-01	53.66210
2003-01-01	60.59490
2004-01-01	63.33740
2005-01-01	64.30180
2006-01-01	77.54790
2007-01-01	84.67760
2008-01-01	80.69400
2009-01-01	90.07250
2010-01-01	86.11050
2011-01-01	75.57040
2012-01-01	77.08570
2013-01-01	75.42110
2014-01-01	62.42190
2015-01-01	63.55280
2016-01-01	58.74380