2005

5.2

1993

5.5

2007

7.3

2004

6.6

2009

5.9

2002

4.5

2006

6.0

2018

6.4

2015

6.9

2003

7.0

2003

6.0

2011

5.2

2006

6.9

2001

6.0

2008

6.2

2000

5.2

2004

7.5

1999

5.9

2005

6.8

1990

7.4