2010

7.5

1999

4.4

2006

5.2

1989

0.0

2011

7.2

1997

6.0

1995

7.6

1990

5.5

2010

5.9

2006

6.6

1991

6.4

1991

5.5

2002

7.6

1989

5.0

1986

6.1

2003

6.0

1988

3.2

1996

7.0