2011

4.7

2002

7.2

2002

6.3

2006

5.6

2000

6.8

1989

7.1

2003

6.7

1995

7.3

2007

6.8

1993

5.3

2008

5.8

2016

2.6

2008

7.5

1995

6.3

1996

6.1

1994

6.1

1999

2.0

2005

5.9

2002

6.0

2005

6.3