2003

6.0

2000

8.2

2000

6.3

2001

7.8

1996

7.5

1980

6.6

1982

6.4

1988

7.5

2001

6.8

2001

5.4

1974

7.8

1955

7.5

1968

7.3

1962

7.2

1995

6.5

2004

7.1

2004

6.3

1988

5.0

1991

7.1

1984

7.0