2014

4.6

1996

6.0

1977

6.8

1992

6.6

1994

6.2

2008

4.1

2017

4.5

1998

4.8

1999

6.3

2010

5.5

2014

4.0

2017

0.0

1995

4.7

2006

3.8

1961

5.0

2008

5.0

2007

6.2

2009

5.8

1974

8.0

2024

5.2