1995

7.6

2009

6.1

2006

7.8

2008

6.0

1954

6.3

2017

7.0

2007

6.1

1976

4.5

2001

4.3

2005

7.5

2002

5.1

1977

7.3

1987

7.7

2015

5.1

2009

4.5

2004

7.8

2009

5.2

2014

7.0

2002

7.1

2005

6.3