2008

6.9

2020

7.0

1999

8.2

2013

6.3

2009

5.0

1970

6.1

6.0

2016

6.7

1932

6.2

2017

5.7

2001

6.7

1986

5.9

1965

7.2

1995

5.0

2010

6.5

1994

6.3

2013

6.7

2003

6.5

1992

6.3

2000

6.3