1986

6.6

2011

7.1

2001

7.2

1969

6.8

1949

8.0

1931

7.3

1956

7.1

1944

6.1

1940

7.0

1951

7.4

1988

5.2

2013

6.7

1993

6.2

2014

5.8

2005

7.1

1978

8.0

1956

6.1

2011

9.7

1974

5.7

1984

7.2