1989

2.8

1998

6.1

1997

6.8

1995

7.1

2006

4.3

1986

0.0

1993

6.7

2005

5.0

1994

0.0

1987

4.0

2000

7.0

1983

6.1

1995

7.7

1990

7.0

1994

6.1

1988

6.2

2011

5.9