2005

6.3

2004

6.3

1984

7.1

1994

8.5

1983

4.0

2001

5.4

1994

6.8

2002

6.7

1944

7.3

1997

7.7

1994

6.2

2002

7.1

1996

7.3

1994

6.8

2005

6.9

1994

5.3

2006

7.0

1993

6.7

1995

8.0

1999

7.6