1967

6.7

1953

7.3

1994

6.4

2006

10.0

1964

7.3

2006

5.5

2005

5.5

1966

6.8

2008

7.6

2013

6.1

2007

6.5

2003

5.5

1949

7.5

1968

7.6

2010

6.6

1970

6.3

1979

6.1

2011

6.2

1966

6.1

2010

8.4