Year	Number of Years
1982-01-01	73.2195121951220
1983-01-01	72.7682926829268
1984-01-01	72.9195121951220
1985-01-01	72.6682926829268
1986-01-01	73.5195121951220
1987-01-01	73.6707317073171
1988-01-01	74.2707317073171
1989-01-01	74.3219512195122
1990-01-01	74.5219512195122
1991-01-01	75.9243902439025
1992-01-01	75.4243902439025
1993-01-01	75.5731707317073
1994-01-01	75.8219512195122
1995-01-01	75.9707317073171
1996-01-01	76.1707317073171
1997-01-01	76.3707317073171
1998-01-01	76.5707317073171
1999-01-01	76.7707317073171
2000-01-01	76.9707317073171
2001-01-01	77.1707317073171
2002-01-01	77.3707317073171
2003-01-01	77.5707317073171
2004-01-01	77.7219512195122
2005-01-01	77.8707317073171
2006-01-01	78.0707317073171
2007-01-01	78.2219512195122
2008-01-01	78.3707317073171
2009-01-01	78.5707317073171
2010-01-01	78.7219512195122
2011-01-01	78.8707317073171
2012-01-01	79.0219512195122
2013-01-01	79.1707317073171
2014-01-01	79.3219512195122
2015-01-01	79.4707317073171
2016-01-01	79.6219512195122