1999

7.9

1975

5.0

1973

6.9

1971

6.4

2009

6.2

1997

7.5

1991

3.7

1979

6.8

1973

7.2

1993

8.0

1975

7.0

1973

7.0

1974

7.0

1972

7.9

1984

7.5

1974

6.2

1969

6.0

1994

3.5

1974

0.0

1965

5.5

1982

3.0

2001

6.3

2010

6.3

1976

5.0

1996

6.7

1972

6.8

1970

6.2

1990

5.3

1987

4.0

1974

3.0

2007

4.9

1976

7.8