1979

6.9

1987

7.6

2005

7.7

1996

6.9

1984

8.4

1930

7.2

1990

7.5

1984

6.5

2017

6.4

1989

6.1

2007

6.0

1988

5.0

1992

7.0

2024

7.4

2008

6.3

2006

7.6

1980

5.8

2002

6.8

1977

5.0

1987

7.4