2014

6.7

1962

7.0

1963

7.1

1967

6.6

1969

6.6

1974

6.4

1981

6.5

1985

6.2

1987

6.5

1997

6.4

1995

7.6

2005

7.4

2006

6.3

2023

6.0

1966

7.3

1929

6.5

1971

6.8

1954

8.0

2012

0.0

2002

7.2