1968

7.0

1997

0.0

1996

0.0

1997

3.0

1970

6.8

1974

6.5

1995

5.8

1998

1.0

1968

7.1

1967

6.8

2001

3.8

1979

6.7

1973

5.2

1985

0.0

1969

6.1

1990

5.7

1966

7.6

1997

4.0

2001

2.3

1991

6.6

1988

7.0

1973

4.8

1984

7.2

1967

7.6

1961

5.1

1986

5.0