Year	Percent
1999-01-01	2.6494900000000000
2000-01-01	3.7195900000000000
2001-01-01	3.9260900000000003
2002-01-01	4.1366400000000000
2003-01-01	10.7765000000000000
2004-01-01	10.4457000000000000
2005-01-01	4.9708300000000000
2006-01-01	5.9493700000000000
2007-01-01	7.3096300000000000
2008-01-01	6.5482000000000000