1966

7.5

1979

6.8

2003

7.7

2004

7.4

1996

4.0

1982

7.6

2005

4.0

1974

8.0

2003

0.0

1987

7.7

1984

7.3

2008

0.0

2002

0.0

2012

7.4

2013

7.3

2012

2.0

2013

5.4

4.0

2001

0.0

1999

4.0