1960

5.6

1967

6.8

2001

6.1

1964

5.7

1908

4.4

1907

5.0

1909

3.1

2005

0.0

1999

6.2

1938

6.5

1989

6.3

2002

6.9

2013

7.0

2007

3.5

1913

5.3

1938

5.2

1949

6.3

2013

7.0

1908

4.8

1989

6.6