1999

7.3

1996

6.9

2000

0.0

2002

6.3

1981

7.0

2012

5.0

2011

6.1

1999

0.0

1986

7.3

2002

0.0

1995

0.0

2000

7.1

2009

1.0

1997

1.0

1988

10.0

2003

6.7