1976

5.5

2003

5.5

1997

7.4

2004

4.0

1998

5.6

1974

0.0

2002

5.4

2001

1.0

2002

7.9

1993

8.1

2005

6.3

1990

7.4

2001

7.6

1999

7.9

1995

0.0

2005

0.0

2008

6.6

1997

4.9

1989

8.0

1988

7.3

1978

10.0

2000

7.0

2011

7.7

2010

7.1

2013

0.0