1982

3.2

1993

7.1

1995

7.1

2000

7.5

1991

7.3

1999

5.5

2013

6.5

1988

4.7

2012

6.4

2005

0.0

1998

7.0

2004

7.6

2010

7.7

2004

5.5

1995

6.6