1985

6.1

2007

6.9

2012

7.1

2020

5.5

1999

6.8

2009

5.6

2020

6.7

2023

6.4

2011

6.8

2011

5.9

1992

6.9

1994

6.2

2009

6.7

6.5

2014

7.2

2005

5.2

2021

6.1

2021

6.6

2024

7.4