2001

4.3

2003

5.0

2008

6.1

2014

6.9

2017

7.3

2009

6.7

1992

6.5

2015

5.5

2007

5.0

1999

5.6

1974

5.3

1984

9.0

1984

9.0

1978

5.8

1963

0.0

2006

9.0

2020

6.9

2010

0.0

2023

0.0

2005

6.0