1981

5.2

2006

5.0

1996

6.5

1995

8.0

1997

4.5

2009

3.5

2021

0.0

2001

5.0

2002

1.0

2002

6.5

1998

2.0

2011

6.0

2004

6.6

2007

6.0

2000

0.0

2.0

2004

0.0

1970

6.2

2001

0.0

2001

4.4

2007

5.2

1998

4.5

2003

0.0

1991

1.0

2002

0.0

2016

0.0

2021

6.0