Year	Percent
1973-01-01	9.51671
1974-01-01	9.50450
1975-01-01	14.99580
1976-01-01	15.08850
1977-01-01	16.61540
1978-01-01	21.34660
1979-01-01	16.87820
1980-01-01	16.87820
1981-01-01	16.87820
1982-01-01	16.87820
1983-01-01	16.87820
1984-01-01	16.87820
1985-01-01	16.87820
1986-01-01	16.87820
1987-01-01	16.87820
1988-01-01	16.87820
1989-01-01	16.87820
1990-01-01	16.87820
1991-01-01	16.87820
1992-01-01	16.87820
1993-01-01	16.87820
1994-01-01	16.87820
1995-01-01	16.87820
1996-01-01	16.87820
1997-01-01	16.87820
1998-01-01	16.87820
1999-01-01	16.87820
2000-01-01	40.59790
2001-01-01	39.58040
2002-01-01	29.94000
2003-01-01	24.61870
2004-01-01	18.04560
2005-01-01	11.83930
2006-01-01	9.68168
2007-01-01	9.27960
2008-01-01	10.71230
2009-01-01	17.98780
2010-01-01	14.60370
2011-01-01	33.84130
2012-01-01	14.12280
2013-01-01	26.44100
2014-01-01	26.44100
2015-01-01	87.35650
2016-01-01	72.93900