2006

5.8

1958

7.7

1981

6.4

1998

7.7

1996

6.9

2006

6.9

1971

7.6

1930

7.2

2006

6.4

2002

6.6

1998

7.3

2000

6.3

1987

7.8

2005

7.0

2004

6.9

2006

6.2

2017

5.2

1983

6.3

2007

5.8

2003

6.8