2007

6.5

2010

6.6

2007

6.9

1998

5.5

2015

5.3

2017

6.5

2013

6.9

2015

6.9

2012

5.9

1995

6.5

2007

6.5

2010

7.0

1968

6.6

2011

6.3

2003

5.7

2014

5.8

2015

7.2

1989

5.9

2014

7.0

2012

6.3