1987

7.1

1985

2.0

1986

0.0

1984

7.6

1985

6.3

1992

5.5

2007

0.0

1998

7.1

1990

0.0

1980

5.3

1995

7.7

1996

7.1

1987

6.6

1993

8.4

1994

6.0