2002

6.2

1970

6.0

1964

6.5

1999

6.1

1966

5.2

2002

6.7

1975

6.3

2016

6.3

2014

6.5

2005

6.0

1931

6.8

1935

5.0

2006

5.8

2005

5.9

2006

6.2

1993

6.4

1974

0.0

2004

7.2

2007

6.7

1996

6.9