1987

7.1

1994

5.9

1990

6.0

2004

6.6

1993

6.9

1985

6.5

1984

7.3

1995

7.3

1987

5.9

1986

7.2

1994

10.0

1984

7.5

1994

4.5

1992

6.7

1991

6.0

1981

6.7

1990

3.5

2002

7.1