1971

2.3

1991

7.3

1980

5.8

1975

4.0

2004

5.0

1977

7.0

1980

6.7

1969

5.2

1999

6.6

1967

0.0

1984

5.2

1989

3.7

1987

6.5

1964

7.0

2001

2.0

1966

6.7

1985

10.0

2000

6.0

1978

0.0

1992

6.5

1982

4.5

1988

0.0

2002

2.0