1997

7.3

1995

5.8

2006

8.2

2003

6.1

2015

6.3

2004

7.4

1994

8.4

2003

0.0

2005

8.2

1993

3.3

2005

5.5

1987

7.7

2003

7.0

1996

7.8

2001

5.6

2007

6.4

2002

6.8

1995

6.5