6.5

2015

6.7

1992

6.5

2009

6.7

2020

6.4

2008

5.8

2012

7.0

2013

6.5

2003

6.3

2009

7.3

2003

7.2

1997

7.5

2002

7.1

2017

6.1

1994

6.2

1997

5.4

2011

5.7

2014

6.3

2014

7.7

1964

7.4