1976

7.3

1996

7.1

2001

6.9

1973

0.0

1999

0.0

2013

4.5

2006

7.4

2025

0.0

2010

5.3

2012

5.0

1967

5.5

1996

8.1

2011

7.5

2003

5.2

1993

5.5

8.0

1989

7.0

1995

7.2

2025

8.0

2025

6.7