2008

6.7

2005

5.3

2014

8.4

2015

7.2

2000

8.2

1991

8.3

2012

7.3

2001

7.9

1977

8.2

2006

7.9

2006

8.2

2019

7.4

2015

7.6

1994

8.7

2014

8.0

1984

7.7

2001

7.7

2016

7.3

2012

7.4

2009

8.0