2001

6.8

2017

6.6

1999

4.8

1995

6.7

2007

6.9

2009

7.2

1989

0.0

2000

3.0

1997

3.7

2002

5.8

2002

0.0

1999

5.7

2008

6.4

1990

6.0

2014

6.5

1992

2.8

2009

6.6