2004

6.7

1968

3.5

1992

7.4

2006

7.4

1999

7.5

1973

5.3

1930

6.8

1972

3.5

1976

5.3

1997

3.7

1977

5.6

1982

6.2

1977

5.1

2004

5.0

1977

4.5

1990

5.7

2005

5.0

1972

6.1

2004

5.3

1971

3.7