1942

7.8

1980

7.3

1997

6.6

1973

7.0

1993

6.7

1999

7.6

2004

6.3

2005

6.2

1980

7.3

1956

0.0

2003

5.5

1965

6.8

1982

5.2

1998

7.1

1963

5.8

1984

7.1

1984

6.8

1931

7.0

2005

6.3

2008

6.2