1984

7.4

1998

0.0

1993

5.0

2002

6.5

1985

6.8

2010

7.2

1994

4.3

2000

6.5

1987

7.0

1980

6.1

1986

4.6

1991

5.5

2002

5.7

2000

5.6

1989

5.4

1985

5.9

1986

6.0

1998

5.0

1993

4.5

2003

5.0