2004

8.3

1997

8.1

1982

7.5

2015

7.5

2003

8.2

1987

8.4

2006

8.6

2010

7.8

2005

7.8

1994

8.4

2010

8.1

2000

8.0

1964

7.9

2006

7.8

2002

7.7

1998

6.9

1987

7.5

1982

7.6

2001

8.0

1957

7.0