1927

8.1

1990

7.7

1940

7.3

1961

6.0

1925

6.0

1935

6.6

2008

6.5

1996

6.9

1958

7.0

2008

3.5

2007

5.5

1993

5.0

2010

5.4

2023

6.3

2015

6.5

1973

3.5

2008

6.2

1994

7.1

2013

6.0

1916

0.0