1981

6.7

1995

6.8

1972

7.3

1995

8.2

1978

6.7

1989

6.2

1984

5.8

1978

7.3

1966

0.0

1985

0.0

1966

0.0

1980

6.3

1965

7.8

2005

5.0

1982

3.5

1979

6.8

1991

6.1

1968

7.8

1973

6.5

2003

7.5

2003

0.0

1998

5.6

1994

6.0

1978

5.5

1997

1.0