Year	Percent
1983-01-01	32.32270000000000
1984-01-01	32.10180000000000
1985-01-01	40.42540000000000
1986-01-01	41.01610000000000
1987-01-01	46.88590000000000
1988-01-01	40.46550000000000
1989-01-01	40.41170000000000
1990-01-01	33.76740000000000
1991-01-01	32.47270000000000
1992-01-01	23.52650000000000
1993-01-01	20.21160000000000
1994-01-01	22.36940000000000
1995-01-01	21.23700000000000
1996-01-01	27.70840000000000
1997-01-01	32.30510000000000
1998-01-01	43.56820000000000
1999-01-01	42.68590000000000
2000-01-01	50.72290000000000
2001-01-01	49.07050000000000
2002-01-01	52.59110000000000
2003-01-01	55.81170000000000
2004-01-01	64.24450000000000
2005-01-01	70.67560000000000
2006-01-01	88.02780000000000
2007-01-01	101.78900000000000
2008-01-01	96.29160000000000
2009-01-01	114.87100000000001
2010-01-01	98.09250000000000
2011-01-01	77.52500000000000
2012-01-01	80.34910000000000
2013-01-01	72.88240000000000
2014-01-01	55.04710000000000
2015-01-01	49.43790000000000
2016-01-01	44.17280000000000