2001

6.7

2010

7.0

1984

6.6

1999

8.0

6.8

1931

5.8

1990

7.4

2020

6.3

2003

7.6

2009

5.7

2006

7.0

2009

5.6

2008

6.2

2012

5.7

2004

6.0

2020

6.4

2017

6.0

2010

6.0

2004

5.1

2021

5.0