2001

6.0

2001

6.3

1996

5.5

1993

6.0

1992

7.2

2006

6.5

2003

4.0

1996

6.9

2007

7.3

1973

6.9

1965

4.8

1996

5.6

1968

4.2

1933

5.9

1971

7.2

2004

5.0

1963

8.3

1980

5.5

2002

6.1

2005

6.7