1985

5.8

2012

1.0

2009

7.8

1955

5.2

1958

0.0

1915

0.0

1987

7.0

1999

0.0

1997

7.3

1997

5.3

2006

6.2

1967

6.9

2006

5.5

2003

5.0

1982

6.1

2001

2.7

2005

5.3

2001

0.0

1972

4.9

1997

5.0