2002

6.6

2001

7.4

2005

6.7

1979

7.0

1992

8.1

1999

7.3

2006

6.6

1985

7.0

2007

6.7

1960

6.4

1955

7.2

1975

1.0

1997

6.3

1952

5.2

2014

6.1

1963

7.2

1938

6.3

1953

6.2

2023

0.0

2008

4.4