Year	Percent
1989-01-01	44.054800000000000
1990-01-01	79.429300000000000
1991-01-01	40.154900000000000
1992-01-01	42.222600000000000
1993-01-01	40.975700000000000
1994-01-01	29.780300000000000
1995-01-01	22.284900000000000
1996-01-01	41.421100000000000
1997-01-01	42.149900000000000
1998-01-01	82.331800000000000
1999-01-01	45.567900000000000
2000-01-01	29.488300000000000
2001-01-01	42.886300000000000
2002-01-01	44.648800000000000
2003-01-01	29.491700000000000
2004-01-01	34.989400000000000
2005-01-01	38.002600000000000
2006-01-01	36.022700000000000
2007-01-01	54.461999999999996
2008-01-01	49.169400000000000
2009-01-01	56.535700000000000
2010-01-01	34.688500000000000
2011-01-01	27.645700000000000
2012-01-01	23.186999999999998
2013-01-01	26.827700000000000
2014-01-01	25.315600000000000
2015-01-01	20.718300000000000
2016-01-01	23.205700000000000
2017-01-01	19.563000000000000