2020

6.8

2021

6.2

6.8

1975

4.5

2015

6.4

2018

6.7

5.0

1993

5.6

1999

7.1

5.7

2014

7.0

2009

7.1

1984

6.7

1952

7.0

2005

8.3

6.4

2012

6.5

2020

6.1

2006

4.7

2022

4.5