2005

6.8

1990

7.7

1997

6.8

1995

5.8

2003

6.8

1944

7.2

2007

6.8

1993

6.4

2005

6.3

2007

6.3

1958

6.2

1963

9.0

2002

6.8

2008

6.5

2015

5.4

1998

6.3

2007

4.8

1955

6.3

1987

6.7

1987

6.7