2006

7.4

2000

7.0

1983

6.8

2003

6.9

2002

5.9

2005

6.2

1995

7.3

2001

7.0

2005

6.5

2007

6.7

1998

7.2

1938

3.8

1985

5.4

2021

5.6

2005

7.2

2005

7.0

2007

5.7

2016

6.3

1981

6.4

2014

6.5