1974

7.0

1957

7.2

2012

7.9

1997

7.4

2002

6.6

2011

6.6

1957

7.9

1994

7.9

1968

8.1

2014

7.7

1963

6.7

1961

8.0

2003

7.0

1971

7.8

1964

7.0

2012

6.3

2012

7.0

1967

7.5

1977

6.8

2017

6.5