1995

6.3

2008

6.2

2007

8.0

2007

7.2

2005

5.9

1978

6.8

1944

4.3

1994

8.3

1998

7.1

2013

4.2

2012

0.0

0.0

2002

5.7

2005

6.2

2015

0.0

2017

7.0

2006

5.5

2006

6.4

1988

7.0

2021

5.7