2005

6.1

2005

6.5

2004

6.6

1997

6.7

2003

5.5

1943

7.8

2015

6.3

2006

5.8

2006

8.0

2004

6.9

2006

6.1

1998

7.3

1981

6.4

1996

6.9

1987

7.8

2004

1.0

1974

6.7

2005

6.3

2005

4.5

2006

6.9