2001

7.0

1967

7.3

1968

7.1

1961

7.7

1997

7.1

1995

7.0

2003

7.1

1999

7.5

1996

6.9

1967

6.3

1984

7.2

2005

6.4

2017

6.5

2000

6.8

1986

6.9

1986

6.1

2006

7.2

1952

6.7

1987

6.8

1932

7.0