2004

5.6

1987

7.3

1996

6.6

2002

7.0

2005

6.3

2001

6.7

2002

1.0

1995

4.7

1999

6.8

1998

6.6

1993

5.5

2006

7.0

2004

4.6

2003

6.0

2005

6.0

1977

3.3

2013

6.1

1988

5.2

1994

3.7

2004

6.3