1980

6.7

1992

7.7

2022

7.0

2006

5.5

1984

7.3

2020

9.0

2017

5.0

1999

5.5

2004

5.9

2006

5.5

2006

6.1

1976

7.3

1985

6.2

2008

7.5

2007

5.8

1992

6.1

2007

7.2

2001

6.7

1996

7.4

1978

6.7