1999

7.5

1996

6.4

2001

6.6

2007

7.9

1990

7.9

2004

7.5

1967

7.4

2000

8.5

2002

8.0

1970

7.6

1984

7.1

2001

2.0

2002

8.1

2005

2.8

1987

0.0

2024

0.0

1984

7.7

2006

7.8

2005

8.0

1995

7.1