1984

5.8

1973

6.9

1943

6.2

1957

6.8

1974

7.5

1974

6.2

1971

5.5

1964

6.1

1971

4.6

1970

5.8

1966

6.4

1965

6.7

1973

3.1

1981

3.3

1965

4.6

1991

5.7

1966

4.3

2013

6.0

1996

7.4

2004

4.0