Year	Percent
1980-01-01	5.20765
1981-01-01	5.38235
1982-01-01	6.23725
1983-01-01	6.02779
1984-01-01	5.38891
1985-01-01	4.30105
1986-01-01	4.21052
1987-01-01	4.04019
1988-01-01	5.36605
1989-01-01	5.63729
1990-01-01	7.16178
1991-01-01	8.30280
1992-01-01	8.23343
1993-01-01	10.47840
1994-01-01	8.75863
1995-01-01	8.58686
1996-01-01	8.47824
1997-01-01	8.77383
1998-01-01	10.94610
1999-01-01	10.74590
2000-01-01	9.16784
2001-01-01	9.61077
2002-01-01	10.77030
2003-01-01	12.00550
2004-01-01	11.38080
2005-01-01	11.39860
2006-01-01	10.87430
2007-01-01	10.58420
2008-01-01	14.55260
2009-01-01	16.43900
2010-01-01	20.22860
2011-01-01	20.10330
2012-01-01	19.74990
2013-01-01	23.10020
2014-01-01	22.67420
2015-01-01	24.87490
2016-01-01	25.68840