Year	Percent
1992-01-01	37.6753
1993-01-01	41.0891
1994-01-01	34.1017
1995-01-01	28.5676
1996-01-01	27.6485
1997-01-01	31.9762
1998-01-01	35.1060
1999-01-01	31.9360
2000-01-01	33.7675
2001-01-01	38.2642
2002-01-01	39.2434
2003-01-01	53.9895
2004-01-01	89.4447
2005-01-01	144.1130
2006-01-01	129.4240
2007-01-01	99.8106
2008-01-01	75.3392
2009-01-01	72.6138
2010-01-01	63.7441
2011-01-01	52.1543
2012-01-01	48.2628
2013-01-01	56.2433
2014-01-01	62.8944
2015-01-01	69.1169
2016-01-01	68.3704
2017-01-01	65.8914