1928

7.0

1935

6.6

2007

4.9

1989

5.7

1987

6.5

1975

7.5

2002

6.1

1982

5.9

1971

6.5

1977

6.2

1966

6.6

1968

6.8

2020

7.0

2008

6.3

1987

6.8

1996

5.7

1984

7.2

1940

7.0

2011

6.3

2008

5.9