2005

7.0

1978

6.0

2014

7.5

2006

7.1

2007

6.1

2008

6.6

2014

3.1

1984

6.0

2015

4.7

1971

5.7

2006

6.5

2008

4.2

2010

6.7

1979

5.4

2010

6.3

1985

5.1

2017

6.8

2018

5.3

1967

4.8

2000

5.7