1981

5.3

2006

6.5

1996

6.6

1995

8.0

1997

4.5

2009

3.4

2021

0.0

2001

5.7

2002

1.0

2002

6.2

1998

2.0

2011

6.0

2004

6.6

2007

6.0

2000

0.0

1999

2.0

2004

0.0

1970

6.1

2001

0.0

2001

3.8

2007

5.2

1998

3.3

1987

0.0

2003

0.0

1991

1.0

2002

0.0

2016

0.0

2021

5.5