1990

6.1

2007

10.0

2015

7.4

2021

6.0

2014

5.6

2014

6.2

2023

6.5

2013

8.6

2003

7.2

2022

4.0

2001

4.9

1994

5.0

2009

6.0

1933

6.8

2011

6.1

1918

5.7

2010

3.5

2005

8.6