2007

6.6

1974

7.0

2004

5.3

1979

6.9

2005

6.3

2000

5.0

1998

5.1

1999

7.5

2001

6.4

1958

7.6

1953

7.6

1997

7.1

2002

7.1

2006

6.0

2003

5.8

1995

7.3

1994

7.3

2002

6.5

1995

6.7

2005

6.5