Year	Percent
1965-01-01	92.8024
1966-01-01	90.8812
1967-01-01	96.4821
1968-01-01	96.9363
1969-01-01	96.8047
1970-01-01	91.2457
1971-01-01	80.9500
1972-01-01	78.9023
1973-01-01	91.5832
1974-01-01	98.6034
1975-01-01	98.4647
1976-01-01	95.1326
1977-01-01	81.0753
1978-01-01	79.3374
1979-01-01	74.9332
1980-01-01	77.2257
1981-01-01	74.6282
1982-01-01	70.1289
1983-01-01	71.2783
1984-01-01	66.7396
1985-01-01	64.9903
1986-01-01	72.0512
1987-01-01	91.0266
1988-01-01	89.8545
1989-01-01	93.3079
1990-01-01	94.4329
1991-01-01	91.9611
1992-01-01	73.2981
1993-01-01	61.3677
1994-01-01	62.1191
1995-01-01	64.1316
1996-01-01	69.5206
1997-01-01	74.2923
1998-01-01	78.2068
1999-01-01	80.7090
2000-01-01	83.9390
2001-01-01	87.0067
2002-01-01	85.8322
2003-01-01	74.7278
2004-01-01	67.1065
2005-01-01	70.8078
2006-01-01	83.1634
2007-01-01	92.8428
2008-01-01	94.1258
2009-01-01	96.0236
2010-01-01	88.8243
2011-01-01	82.7546
2012-01-01	82.7429
2013-01-01	78.3072
2014-01-01	70.9366