1973

5.7

2020

4.5

1932

7.3

1966

6.8

2013

3.4

1939

6.7

1971

5.5

1964

6.1

1970

5.9

1972

4.8

2007

4.3

2004

6.4

1979

7.3

2005

5.0

2009

6.5

2020

6.3

1921

6.3

1999

5.5

1977

6.6

1999

6.5