1970

0.0

2003

8.5

1985

6.5

2012

0.0

2013

6.5

1985

6.3

2002

7.0

2013

0.0

1993

6.6

1995

8.0

1981

8.0

1984

7.3

2008

9.0

1998

7.2

1973

5.7

2006

8.1

1993

8.0

1992

7.6

2000

7.0

1997

8.1