1985

5.3

1975

6.3

1952

4.0

2017

6.9

2004

4.8

1995

6.9

1968

6.4

1965

6.1

1966

6.1

1966

5.6

1976

7.4

2017

6.7

1970

7.5

1962

7.0

1990

6.5

1982

7.6

1964

6.2

1994

6.9

1997

5.2

1992

7.4