1995

5.3

2002

6.1

1984

3.7

1985

6.2

2003

5.0

1996

5.0

1990

5.6

2008

7.0

1994

3.5

1983

4.3

1991

5.0

1987

5.0

1985

5.0

1993

5.0

1990

5.0

1993

5.0

1990

3.8

1989

4.7