1990

6.1

2009

7.4

6.6

2015

5.4

1985

6.1

1989

7.0

2018

6.3

2024

6.0

2024

7.4

2021

7.1

1979

10.0

2020

6.4

2003

4.9

2016

5.9

2000

6.7

2010

6.2

2019

8.1

2013

6.7

2017

6.5

2019

6.8