2005

6.9

2008

6.7

1960

7.6

1980

7.3

2012

6.8

2021

7.3

2009

6.4

1990

7.9

2005

6.2

2010

7.2

2009

7.5

1963

7.9

1973

7.0

2000

7.6

2012

6.6

2001

7.8

2004

8.5

2016

7.3

1987

7.7

2009

7.9