2006

6.7

1994

6.9

1988

4.0

2011

6.9

1988

0.0

1986

5.0

2014

8.5

1996

7.1

2001

7.2

2010

3.6

1992

0.0

1989

0.0

1987

10.0

1988

5.0

2012

6.4

1995

7.3

1986

7.3

1985

6.0

1999

7.3

2003

6.2

1984

7.6

1984

7.0

1983

6.3

1998

6.8