Year	Percent
1980-01-01	7.40565
1981-01-01	9.14842
1982-01-01	11.92670
1983-01-01	15.04450
1984-01-01	19.10060
1985-01-01	21.23970
1986-01-01	20.50210
1987-01-01	22.07920
1988-01-01	20.91950
1989-01-01	23.05750
1990-01-01	22.53160
1991-01-01	21.58650
1992-01-01	22.95420
1993-01-01	38.83760
1994-01-01	45.38120
1995-01-01	40.76590
1996-01-01	38.48010
1997-01-01	38.31820
1998-01-01	37.38020
1999-01-01	36.85250
2000-01-01	38.55950
2001-01-01	40.71070
2002-01-01	43.10220
2003-01-01	42.03250
2004-01-01	42.86370
2005-01-01	43.22890
2006-01-01	47.87660
2007-01-01	53.43680
2008-01-01	54.44530
2009-01-01	87.29810
2010-01-01	78.91760
2011-01-01	74.54310
2012-01-01	88.80940
2013-01-01	88.90580
2014-01-01	85.40270
2015-01-01	96.42290
2016-01-01	89.09000