1985

6.1

1998

6.0

2023

6.8

2005

5.2

2007

9.8

2015

6.2

2004

6.6

2012

7.1

2002

5.8

1992

6.4

1992

5.7

1998

6.2

2000

6.4

1993

6.1

2004

6.5

2020

7.4

1973

9.2

2009

5.8

1997

5.4

2010

6.0