1980

6.8

1994

5.4

2000

4.8

1995

3.8

1986

5.2

2002

3.7

2025

6.0

2009

5.0

1933

0.0

1981

6.5

1984

6.1

1972

3.1

1966

6.1

2004

4.8

1923

6.8

2003

7.1

1987

6.6

1940

6.0

2002

7.4

2008

5.5