2020

6.0

1988

6.2

1995

4.6

1992

6.4

2010

6.8

1994

6.2

2003

6.3

1963

6.9

2004

6.1

2012

7.3

2001

5.8

2008

5.1

2013

7.2

2011

5.9

1968

6.8

2010

7.9

2010

5.8

2009

6.3

1980

5.9

2010

6.3