Year	Percent
1989-01-01	31.2933
1990-01-01	25.7675
1991-01-01	29.8219
1992-01-01	43.1150
1993-01-01	71.7709
1994-01-01	88.1987
1995-01-01	79.8347
1996-01-01	64.6447
1997-01-01	34.3040
1998-01-01	22.9589
1999-01-01	37.2135
2000-01-01	33.0289
2001-01-01	26.0885
2002-01-01	30.8451
2003-01-01	54.5594
2004-01-01	69.4458
2005-01-01	63.7568
2006-01-01	61.8282
2007-01-01	66.5316
2008-01-01	54.6107
2009-01-01	49.2713
2010-01-01	69.0247
2011-01-01	76.0216
2012-01-01	82.3447
2013-01-01	89.2095
2014-01-01	94.7740
2015-01-01	94.3576
2016-01-01	93.7536
2017-01-01	109.5550