Year	Percent
1990-01-01	2.3447000000000000
1991-01-01	3.1584400000000000
1992-01-01	3.9751600000000000
1993-01-01	4.8618100000000000
1994-01-01	4.7066700000000000
1995-01-01	3.5565800000000003
1996-01-01	2.5864400000000000
1997-01-01	3.2080000000000000
1998-01-01	5.0606400000000000
1999-01-01	6.0438700000000000
2000-01-01	7.7348300000000005
2001-01-01	9.3816500000000000
2002-01-01	10.3135000000000000
2003-01-01	30.8606000000000000
2004-01-01	62.7116000000000000
2005-01-01	80.9898000000000000
2006-01-01	96.5094000000000000
2007-01-01	102.5140000000000000
2008-01-01	95.3215000000000000
2009-01-01	103.9760000000000000
2010-01-01	119.1520000000000000
2011-01-01	113.4720000000000100