2005

5.2

2008

7.5

1998

7.3

1992

7.2

2000

7.1

1976

0.0

2003

6.7

1974

6.1

2005

4.0

2007

6.9

1995

6.1

2002

6.6

1977

6.2

1984

5.6

2007

6.9

2007

6.9

1977

5.0

2000

0.0

2008

6.7

2002

6.6