1970

7.6

1985

6.4

2004

7.9

2009

6.4

1982

6.9

2021

6.2

2019

8.0

1966

6.1

2008

8.0

2009

8.5

2022

8.6

2008

7.7

2009

4.6

2006

6.6

1992

6.8

2005

7.4

2017

7.8

2001

5.8

2013

7.4