1977

6.7

2018

6.4

2009

6.2

5.6

2001

5.7

2022

7.1

2023

6.9

2019

10.0

1989

5.9

2014

7.6

7.0

2012

5.7

2017

6.0

1984

6.7

1982

6.4

1991

6.3

2011

0.0

2000

4.0

2021

5.4

2017

4.0