2010

6.9

2010

6.7

2017

5.3

2008

5.6

2004

7.0

1997

6.4

2006

7.4

1999

6.3

1981

7.9

2010

6.8

1969

6.6

2012

6.3

1998

7.8

2003

5.7

1979

7.3

2013

6.1

2008

6.0

2010

6.3

1995

7.9

1986

8.0