Year	Percent
1987-01-01	883.40400000000000
1988-01-01	345.88599999999997
1989-01-01	5.91211000000000
1990-01-01	5.91211000000000
1991-01-01	5.91211000000000
1992-01-01	18.85630000000000
1993-01-01	17.35850000000000
1994-01-01	15.53270000000000
1995-01-01	15.08710000000000
1996-01-01	12.89500000000000
1997-01-01	12.34960000000000
1998-01-01	12.72170000000000
1999-01-01	13.74550000000000
2000-01-01	17.48090000000000
2001-01-01	16.06270000000000
2002-01-01	17.11590000000000
2003-01-01	19.62310000000000
2004-01-01	18.55540000000000
2005-01-01	17.68870000000000
2006-01-01	21.13580000000000
2007-01-01	20.02580000000000
2008-01-01	22.72330000000000
2009-01-01	26.81150000000000
2010-01-01	30.42620000000000
2011-01-01	31.68860000000000
2012-01-01	33.23790000000000
2013-01-01	37.28760000000000
2014-01-01	40.40050000000000
2015-01-01	44.27370000000000
2016-01-01	45.50560000000000