Year	Percent
1991-01-01	1.8619999999999999
1992-01-01	5.2051600000000000
1993-01-01	14.2270000000000000
1994-01-01	22.6459000000000000
1995-01-01	20.0494000000000000
1996-01-01	23.5011000000000000
1997-01-01	17.0157000000000000
1998-01-01	6.2105600000000000
1999-01-01	5.5716700000000000
2000-01-01	4.7663699999999990
2001-01-01	6.0189699999999995
2002-01-01	8.9241700000000000
2003-01-01	8.7736399999999990
2004-01-01	7.7402399999999990
2005-01-01	6.7099400000000000
2006-01-01	5.7865199999999990
2007-01-01	6.1217200000000000