1994

8.3

1940

7.4

1988

7.5

1992

7.7

2007

6.5

1998

7.0

1938

7.1

1985

6.5

1955

7.1

2003

6.3

2005

6.8

2004

6.6

1986

6.8

1967

7.3

2007

6.4

2006

6.5

1997

6.2

1965

4.0

1979

7.0

2016

7.6