1966

6.3

2016

6.4

1965

6.8

2010

7.9

1995

5.9

1931

5.8

1998

5.1

2020

5.5

5.6

2005

6.4

1962

6.9

2005

5.8

1995

7.8

2012

6.1

2012

6.9

2010

6.8

2007

6.4

2006

6.9

2004

7.3

2013

7.7