2004

7.5

2018

7.5

2002

6.2

1984

7.7

2014

5.3

2014

7.0

1978

7.5

1995

6.3

1973

7.5

1981

7.1

2008

7.2

2011

4.0

2006

7.3

1968

7.6

1976

6.6

1977

7.7

2007

6.9

2014

7.4

2014

5.9

2009

7.2