1978

0.0

1971

7.5

1951

6.1

1984

7.0

2005

7.1

1995

5.9

2006

6.6

2007

7.3

2012

0.0

1953

5.0

1972

7.0

2008

6.6

1976

7.0

1968

0.0

2002

7.4

1990

6.9

2016

6.3

2009

6.5

2014

6.7

1985

0.0