2008

7.5

1987

5.9

1966

6.1

1987

6.5

1997

8.0

1970

7.0

1991

7.0

1973

6.5

1989

5.3

1990

7.3

2005

6.3

1999

5.1

1931

8.1

2002

5.8

2007

7.2

1978

6.9

1965

7.2

2006

7.8

1983

7.9

2006

6.6