1976

4.0

1999

7.3

2009

8.5

1989

7.0

2020

9.4

2005

6.9

2000

7.4

1941

5.4

2007

6.3

2019

6.7

1998

6.2

2023

7.8

1952

6.2

2017

5.6

2024

5.9

2017

6.0

2014

5.9

1993

5.5

2011

6.5

2006

7.0