1968

6.4

1996

9.4

1923

8.5

2005

4.8

2006

7.2

2016

6.9

1942

5.7

1981

5.1

2019

5.7

1977

6.9

1968

4.8

2003

6.0

2007

8.1

2021

6.4

1911

6.4

2012

7.5

2010

4.5

2012

9.0

2024

6.9