2020

8.1

1985

6.1

2019

6.7

1976

7.5

1989

5.9

2006

6.4

2006

5.6

2010

7.0

2002

5.0

2017

6.1

2005

6.8

2003

6.3

1997

6.0

2022

6.1

2007

6.3

2001

6.7

2006

6.7

2010

7.8

2002

5.4

1999

7.4