1975

0.0

1979

5.8

1987

7.8

1991

7.5

0.0

2013

8.5

2014

0.0

2005

7.1

1951

8.0

2006

7.1

2006

7.6

1997

4.5

1996

7.0

2004

7.3

1997

7.5

2000

6.2

1992

5.5

2009

8.1

1996

6.0

2024

0.0