1961

7.3

1963

7.0

1964

7.0

1964

7.0

2000

7.1

1924

8.1

2005

6.9

1968

7.3

1997

5.0

1947

6.7

2002

6.1

2002

5.3

1972

6.0

2017

2.0

1953

3.3

1940

4.4

2007

4.6

1985

4.9

2023

5.7

2018

6.2