1992

6.9

1984

8.4

2006

8.6

2008

8.9

1979

7.5

2020

8.3

1995

7.2

2007

7.6

2012

7.7

1997

8.5

1998

7.0

2009

7.4

2007

7.1

2009

7.7

2022

6.8

1938

4.5

1989

8.4

2018

8.0

2001

7.8

2011

7.3