1972

5.7

2005

7.4

1995

6.7

1994

7.7

2007

7.2

2017

6.3

2008

3.0

2009

0.0

2009

2.0

2006

7.8

2001

7.3

2001

6.5

1998

0.0

2013

4.3

2016

0.0

2016

5.0

1997

4.5

2007

5.2

1944

6.2

1976

6.5