2000

6.3

1980

8.4

2007

5.6

2003

5.7

2003

6.2

2010

7.0

2009

6.1

2008

7.4

2002

6.0

2010

6.6

2009

6.5

2005

6.3

2012

5.8

2014

7.0

1991

8.1

2009

7.4

2022

7.8

1998

4.8

1997

6.8

2013

5.8