2021

6.1

2020

6.5

2019

6.1

2011

6.2

2023

5.8

1997

6.2

2016

6.6

2009

8.5

2015

7.4

1953

4.8

2010

5.1

2013

5.8

2015

6.5

2014

5.6

2018

7.0

1984

6.4

1982

6.9

2023

6.8

2001

6.1