2010

6.4

2012

5.4

2009

5.8

2006

6.0

2009

5.6

2016

7.0

2009

5.5

2001

7.3

1989

5.9

2003

6.8

2018

7.4

1984

7.5

2019

8.1

2021

8.0

2003

7.4

2019

7.4

2010

8.4

2019

7.8

1987

7.3

2022

7.6