2011

7.0

2012

7.4

2011

6.5

1985

8.3

2009

6.1

2007

7.7

1968

6.6

1995

6.8

1996

6.9

2004

8.0

1994

8.5

1966

6.1

2007

6.0

2003

5.8

2013

6.7

2013

7.3

2015

7.6

1982

7.5

2008

7.6

2008

8.5