Year	Percent
1998-01-01	44.7086
1999-01-01	39.9139
2000-01-01	53.1000
2001-01-01	45.5000
2002-01-01	26.0763
2003-01-01	35.2680
2004-01-01	34.3829
2005-01-01	40.6088
2006-01-01	38.9705
2007-01-01	30.8229
2008-01-01	22.5447
2009-01-01	21.3083