1991

5.6

1985

6.2

1939

7.0

1943

7.5

1961

7.0

1969

0.0

1936

5.0

1984

0.0

1995

8.0

2015

7.2

1930

5.0

1936

0.0

0.0

2007

6.6

1998

5.5

1998

6.8

1976

6.4

2005

6.7

2009

7.1

1997

6.7