Annual Percent
1968-01-01 45.8827904895351
1969-01-01 46.3911340060886
1970-01-01 46.5430140576220
1971-01-01 47.4653823533183
1972-01-01 48.3542519350746
1973-01-01 47.8263921899110
1974-01-01 49.4213001451402
1975-01-01 50.1280498024200
1976-01-01 49.9520571897065
1977-01-01 48.8311101813262
1978-01-01 47.9401866539717
1979-01-01 47.4729832392302
1980-01-01 47.2940236985381
1981-01-01 47.0846285062806
1982-01-01 46.5428195650025
1983-01-01 45.3101111508425
1984-01-01 45.2535012773560
1985-01-01 45.1983852541294
1986-01-01 45.0216601946496
1987-01-01 44.8495961280933
1988-01-01 44.4127768366312
1989-01-01 43.5224345965529
1990-01-01 42.6397136646379
1991-01-01 41.7987227862529
1992-01-01 41.5583169379057
1993-01-01 41.7028768708598
1994-01-01 41.5982933628546
1995-01-01 41.5016449707375
1996-01-01 41.0533998270413
1997-01-01 40.3051830930908
1998-01-01 40.1841276379153
1999-01-01 40.3921556373547
2000-01-01 40.3413928784990
2001-01-01 39.9239437643897
2002-01-01 40.1738537043839
2003-01-01 39.9841264049002
2004-01-01 39.7381367112932
2005-01-01 39.1262168458263
2006-01-01 38.6025687973218
2007-01-01 37.9804311994132
2008-01-01 37.5780513139584
2009-01-01 36.9157203044033
2010-01-01 36.6997744139310
2011-01-01 36.3137670466598
2012-01-01 36.5557231613083
2013-01-01 34.9367386097528
2014-01-01 33.9095737226282
2015-01-01 33.0872218738946
2016-01-01 31.8118927078503
2017-01-01 30.5515018247563