Year	Percent
1960-01-01	26.81650000000000
1961-01-01	25.92000000000000
1962-01-01	25.94260000000000
1963-01-01	27.10530000000000
1964-01-01	26.84970000000000
1965-01-01	26.79050000000000
1966-01-01	27.19290000000000
1967-01-01	27.63620000000000
1968-01-01	26.95980000000000
1969-01-01	26.05990000000000
1970-01-01	26.37100000000000
1971-01-01	25.62970000000000
1972-01-01	25.30920000000000
1973-01-01	25.13970000000000
1974-01-01	25.11100000000000
1975-01-01	25.51720000000000
1976-01-01	25.51090000000000
1977-01-01	25.09370000000000
1978-01-01	24.51230000000000
1979-01-01	23.17690000000000
1980-01-01	22.81570000000000
1981-01-01	22.20680000000000
1982-01-01	21.07430000000000
1983-01-01	22.02630000000000
1984-01-01	24.17890000000000
1985-01-01	26.69440000000000
1986-01-01	31.08860000000000
1987-01-01	41.56540000000000
1988-01-01	47.97540000000000
1989-01-01	48.14160000000000
1990-01-01	49.32040000000000
1991-01-01	45.09500000000000
1992-01-01	39.89100000000000
1993-01-01	36.65400000000000
1994-01-01	31.06280000000000
1995-01-01	29.53080000000000
1996-01-01	29.67970000000000
1997-01-01	30.12580000000000
1998-01-01	32.23440000000000
1999-01-01	33.35650000000000
2000-01-01	81.49300000000000
2001-01-01	133.66800000000000
2002-01-01	138.93700000000000
2003-01-01	144.28400000000000
2004-01-01	148.17800000000000
2005-01-01	157.53500000000000
2006-01-01	169.58800000000000
2007-01-01	185.87099999999998
2008-01-01	202.69099999999997
2009-01-01	211.92200000000000
2010-01-01	193.57200000000000
2011-01-01	189.82000000000000
2012-01-01	184.02900000000002
2013-01-01	178.54000000000000
2014-01-01	173.47799999999998
2015-01-01	170.75099999999998
2016-01-01	169.06799999999998