1983

0.0

1997

7.9

1985

7.2

2004

5.6

2004

8.1

1987

7.3

2005

7.4

1971

5.6

2013

8.0

1970

5.6

1998

7.0

2024

6.0

2023

7.7

2022

7.1

1949

6.9

2002

4.6

1930

3.5

1988

9.0

2009

6.9

1935

4.5