2021

5.7

2014

7.5

2012

7.0

2015

6.4

2011

4.6

1998

7.1

1997

6.3

1976

5.9

1989

5.2

2014

5.6

2008

5.2

2016

4.5

2002

4.7

2004

6.6

6.1

1992

7.6

2022

6.3

2023

8.7

1997

5.8

2015

6.3