1986

4.3

1970

6.4

1980

6.2

1968

6.8

1986

7.0

1997

6.8

1998

3.4

2009

7.2

1999

7.0

1973

3.3

1984

6.6

2001

0.0

1981

4.4

1988

6.0

1973

6.0

2000

7.1

1978

4.4

1974

2.0

1978

5.8

1981

3.0

1989

7.1

1991

8.0

1998

5.7

1976

3.2

1984

6.1

1991

4.7

1992

4.7

1981

4.8

1983

4.6

1990

5.4

1993

0.0

1993

7.0

1970

4.5

2011

4.0

1969

0.0