2001

4.2

1992

5.4

2000

5.8

1972

7.8

1972

9.0

1985

4.2

1972

0.0

1979

8.0

1998

3.2

1992

7.0

1995

5.0

2007

6.0

1984

5.8

1964

0.0

2003

5.8

1983

1.0

1967

5.3

2004

6.4

1973

7.0

1968

6.0

1978

5.8

2003

5.0

1988

6.3

2007

6.1

2004

4.3

1987

4.2

1992

3.7

1997

4.6

1990

4.8