2013

7.1

2004

5.6

2008

6.4

2017

7.9

1976

6.3

2006

7.2

2006

7.6

1965

5.6

2005

6.2

2007

5.7

2002

6.3

2007

6.2

2004

6.3

2001

5.3

2016

6.6

1964

6.1

1954

7.6

1993

7.0

1998

6.6

1999

5.3