1983

5.0

1994

6.6

1989

6.4

1963

5.7

1957

6.4

1959

7.5

1965

6.1

2011

7.6

2004

8.1

2021

8.3

2014

7.1

2013

6.3

1974

7.9

1968

4.7

1953

5.0

1962

6.4

1988

5.4

1966

7.5

2016

6.5

1957

5.3