2004

6.4

1993

7.9

1977

8.1

1991

7.6

2005

7.0

2021

7.0

2010

7.8

1974

7.0

2007

7.5

2002

8.2

1994

7.8

2009

7.4

2013

7.3

2009

6.9

2004

8.3

2004

7.4

2021

8.4

2014

7.2

1997

8.5

2010

7.8