2008

6.8

2006

5.4

2004

7.9

2009

6.7

2007

7.3

1990

7.5

1989

7.8

2011

5.8

2006

6.9

1971

6.8

2015

6.4

2000

9.4

2021

9.2

1953

4.8

1991

5.9

2012

6.4

2008

6.9

2003

6.4

2011

6.9

2013

6.4