2003

8.0

2005

7.2

1994

8.3

1976

8.1

1998

7.8

1982

6.7

1963

7.0

1990

6.0

2004

7.2

1948

6.9

2008

5.9

2007

6.4

1986

6.9

1998

6.3

2006

4.4

1991

7.3

2002

6.7

1981

6.5

1996

6.5

1998

5.8