2010

6.7

1997

6.5

1999

5.6

2004

7.5

2000

6.8

2005

6.3

2002

6.8

1980

6.9

1993

6.6

1993

5.7

2013

6.3

2000

1.7

2021

6.0

2022

5.2

1985

6.7

1967

7.3

2011

6.4

2007

5.3

2005

6.6

2012

6.0