2006

7.8

2005

8.1

1999

7.6

1978

0.0

1990

10.0

2002

8.1

2005

2.8

1994

0.0

1987

0.0

1989

4.5

2001

8.2

2002

7.1

1995

7.8

2017

0.0

1982

7.0

2014

1.0

2012

9.0

1994

7.8

1976

7.4

2000

4.0