1977

5.2

1985

4.2

1971

6.2

1998

3.2

1970

3.2

1971

5.1

1979

4.8

1969

5.5

1984

3.4

1976

5.8

2005

0.0

1966

3.7

1960

2.3

1999

2.7

1969

4.8

1968

6.0

1986

6.1

1969

6.6

1978

4.2

1970

5.6

1965

0.0

1980

4.4

1988

4.0

1985

5.5

1973

5.3

2004

4.3

1984

5.9

1986

7.0

1991

4.3

1987

4.2

1982

4.1

1986

5.5

1992

4.6

1981

4.4

1983

4.4

1993

3.3

1994

2.7

1990

5.0

1974

4.2

1964

3.7