Year	Percent
1960-01-01	9.99519
1961-01-01	10.01550
1962-01-01	9.94610
1963-01-01	10.25660
1964-01-01	10.68180
1965-01-01	11.91080
1966-01-01	13.86200
1967-01-01	16.26550
1968-01-01	17.88670
1969-01-01	20.01140
1970-01-01	14.36350
1971-01-01	15.28250
1972-01-01	15.17030
1973-01-01	16.04600
1974-01-01	17.42000
1975-01-01	19.20020
1976-01-01	19.54140
1977-01-01	20.31470
1978-01-01	21.01730
1979-01-01	20.85310
1980-01-01	20.66340
1981-01-01	20.16450
1982-01-01	21.45550
1983-01-01	22.50440
1984-01-01	22.81400
1985-01-01	22.99970
1986-01-01	24.38600
1987-01-01	24.84220
1988-01-01	24.39300
1989-01-01	23.46840
1990-01-01	21.47130
1991-01-01	19.07170
1992-01-01	18.60510
1993-01-01	18.55110
1994-01-01	17.60450
1995-01-01	16.88410
1996-01-01	17.62770
1997-01-01	21.64860
1998-01-01	27.21440
1999-01-01	31.77970
2000-01-01	32.21690
2001-01-01	34.01350
2002-01-01	35.01470
2003-01-01	35.34540
2004-01-01	36.14650
2005-01-01	37.10140
2006-01-01	40.26420
2007-01-01	46.25090
2008-01-01	50.47540
2009-01-01	50.69110
2010-01-01	47.77860
2011-01-01	45.68580
2012-01-01	48.02310
2013-01-01	52.45070
2014-01-01	53.21790
2015-01-01	52.91530
2016-01-01	54.42670