Year	Percent
1983-01-01	39.46830000000000
1984-01-01	42.56610000000000
1985-01-01	43.24290000000000
1986-01-01	28.48970000000000
1987-01-01	24.83940000000000
1988-01-01	21.41410000000000
1989-01-01	22.34490000000000
1990-01-01	19.59930000000000
1991-01-01	21.03090000000000
1992-01-01	24.94350000000000
1993-01-01	29.24330000000000
1994-01-01	29.37190000000000
1995-01-01	36.15590000000000
1996-01-01	28.42180000000000
1997-01-01	31.83850000000000
1998-01-01	42.94490000000000
1999-01-01	46.15110000000000
2000-01-01	68.44890000000000
2001-01-01	74.31250000000000
2002-01-01	89.13710000000000
2003-01-01	96.83570000000000
2004-01-01	93.95040000000000
2005-01-01	93.68390000000000
2006-01-01	104.58000000000000
2007-01-01	112.43299999999999
2008-01-01	95.78530000000000
2009-01-01	117.19300000000000
2010-01-01	94.19120000000000
2011-01-01	77.14399999999999
2012-01-01	79.24740000000000
2013-01-01	73.20070000000000
2014-01-01	64.43840000000000
2015-01-01	72.52700000000000
2016-01-01	65.28750000000000