1963

5.7

2011

7.6

2004

8.1

1989

6.5

1974

7.9

2014

7.1

2013

6.4

1957

6.4

1959

7.5

1965

6.2

1994

6.6

1957

5.3

1957

6.3

1966

7.5

1962

6.5

1988

5.4

1968

4.7

2016

6.5

1960

6.2

1953

5.0