1964

6.1

1971

4.9

1980

6.7

2004

6.1

1957

7.0

1969

0.0

1979

6.9

2001

6.9

2013

6.8

1986

6.7

1946

6.5

1945

6.1

1984

5.6

2008

6.2

1943

5.2

1985

5.9

2016

7.3

1985

5.3

1942

6.7

2008

6.7