1994

3.5

2005

5.7

1996

0.0

2002

6.0

1980

7.7

1995

8.2

2009

5.7

1993

7.2

2004

5.8

2006

5.3

2006

4.9

1993

6.0

1995

5.8

1994

7.0

1993

7.5

1997

5.6

2003

7.4

1998

5.2

2012

5.6