1996

7.0

2003

5.8

2008

4.6

1999

5.7

2005

6.0

1990

6.7

2002

5.7

2006

2.7

1999

4.8

2011

5.5

2016

7.0

1997

6.2

2015

5.1

1995

6.3

2000

5.1

2008

5.9

2009

5.5

2013

6.0

1982

6.8

2010

6.1