1968

6.9

2015

6.3

2020

6.9

2017

6.0

1998

6.0

1993

6.1

1993

6.2

1926

5.6

1988

6.4

2021

5.9

1997

4.4

2012

5.6

2022

6.5

1981

7.0

2010

4.5

2011

6.8

1964

6.6

1992

6.9

2006

5.8

2025

7.9