2006

6.8

2005

7.1

2004

6.4

1979

7.8

1985

7.7

1996

6.4

1940

8.3

1999

7.1

1964

8.1

1987

6.8

1990

5.2

1979

5.8

2008

5.3

1989

6.7

1978

6.2

1981

7.0

1988

7.0

2023

10.0

1969

6.4

1972

6.5