1994

8.3

1976

8.1

1998

7.8

2005

7.5

2014

6.4

2003

5.9

1956

7.7

2008

8.5

1997

7.4

1969

6.6

1971

7.0

2004

7.2

1944

8.1

1999

7.0

2006

6.0

2008

6.6

1993

6.3

1999

6.8

1997

7.8

1997

6.8