1999

5.7

2007

6.6

1948

7.9

2004

6.6

2001

6.1

2005

6.7

1988

7.7

1996

7.4

1991

6.2

1993

6.3

2000

5.1

2005

3.8

2001

6.7

2003

6.3

2001

6.9

1997

6.8

1993

5.0

2003

4.9

1997

6.9

2002

5.4