2004

7.1

2011

7.5

2012

4.8

1955

3.0

1998

0.0

1997

5.6

2007

5.0

2015

10.0

1931

5.2

0.0

1970

6.5

1973

7.3

1995

7.7

1994

6.3

1981

7.2

2008

5.3

1998

6.7

2006

0.0

2008

3.8

2009

6.8