2003

7.8

1971

6.4

1997

7.5

1997

6.8

1974

6.5

2007

7.3

1989

6.6

1974

5.5

2007

6.7

1977

0.0

1974

6.8

1973

7.5

1988

5.2

1960

7.6

1999

7.4

2001

6.8

1978

6.3

1969

5.8

2002

6.4

2003

6.7