2007

6.3

2006

7.6

2011

7.5

2005

7.2

2010

5.9

1997

6.5

1991

5.3

2006

5.6

2022

6.6

2002

7.0

7.6

2012

7.7

1989

7.0

2013

7.6

2007

6.3

2003

7.0

2012

7.8

2007

6.9

2005

5.1

2008

6.1