2001

5.9

2003

5.7

1988

7.3

2005

6.9

1985

6.5

2004

6.8

2006

4.3

1996

5.9

2005

5.2

1994

6.0

1992

6.3

1986

6.3

2003

5.5

1999

6.4

1988

7.1

2002

5.7

2001

6.1

1993

6.8

2002

6.8

2012

6.0