2002

6.6

2002

6.6

1998

6.8

1996

6.2

2009

6.0

1998

7.1

2003

5.6

2004

5.5

2003

7.2

2011

6.2

2013

5.6

2007

5.2

1993

4.9

1979

7.3

2000

7.6

1980

8.4

2007

6.5

2006

5.5

2006

6.6

2006

6.6