1957

8.5

1966

7.7

1989

7.2

1996

6.8

1929

7.5

2006

6.9

1984

0.0

1968

0.0

2019

6.1

1969

0.0

2007

6.3

1990

7.0

1999

7.6

1974

0.0

1968

7.4

1936

6.5

1927

5.9

2020

6.7

1965

8.5

2004

6.8