1996

7.5

2011

7.4

1999

0.0

1992

6.8

1998

8.2

2004

3.5

1989

6.9

2003

6.4

2004

7.9

1994

7.8

1993

7.7

2005

8.2

1995

7.3

1985

6.3

1979

6.8

2001

6.4

2002

6.1

1985

3.5

1999

5.6

1997

5.0

1978

5.2

2001

8.1

1989

5.0

1991

6.0

1984

7.2

1978

7.2

2001

6.4

1982

0.0

1998

7.1

1994

7.2

1988

5.0

1988

6.1

1997

4.7