Year	Percent
1979-01-01	5.33277
1980-01-01	10.06040
1981-01-01	13.14870
1982-01-01	10.32610
1983-01-01	20.70260
1984-01-01	19.73060
1985-01-01	29.84340
1986-01-01	26.27950
1987-01-01	42.89080
1988-01-01	26.24700
1989-01-01	29.09920
1990-01-01	32.97980
1991-01-01	35.79650
1992-01-01	30.45430
1993-01-01	40.69510
1994-01-01	47.38600
1995-01-01	40.53320
1996-01-01	51.31620
1997-01-01	48.77160
1998-01-01	53.00940
1999-01-01	54.33860
2000-01-01	52.51730
2001-01-01	69.26620
2002-01-01	77.89680
2003-01-01	83.79450
2004-01-01	72.98060
2005-01-01	75.15190
2006-01-01	89.79120
2007-01-01	111.80900
2008-01-01	76.49130
2009-01-01	92.54600
2010-01-01	76.19370
2011-01-01	79.29570
2012-01-01	68.30480
2013-01-01	57.17810
2014-01-01	55.86940
2015-01-01	63.43760
2016-01-01	68.80910
2017-01-01	19.07280