1982

6.0

1995

5.5

1999

7.9

1992

5.4

1994

6.3

1951

6.7

1933

7.5

1976

6.6

1971

6.1

1978

7.2

1956

6.5

2004

7.0

2002

5.9

1960

7.3

2002

6.2

1986

7.1

1999

7.3

2008

6.2

2005

6.7

1984

6.3