2004

5.6

1986

4.7

1997

7.2

1994

7.8

2006

5.6

1993

5.2

1985

7.7

1987

7.7

1992

5.8

1984

7.3

1992

2.5

1981

6.7

1994

7.0

1988

5.4

2006

7.1

1994

5.5

1989

6.3

1983

5.5