1996

7.0

2001

6.8

1976

7.1

1995

7.2

1993

5.5

2010

5.3

1967

5.3

2006

7.4

2011

7.5

1973

0.0

1996

8.0

2003

5.2

2012

5.0

2013

4.5

1989

7.0

1999

0.0

8.0

2002

6.0

2008

4.0

1966

7.0