2000

8.0

2014

7.5

2018

7.3

2015

7.4

2021

10.0

1999

7.3

2014

6.4

2017

7.3

1961

7.0

2012

8.1

2009

6.4

2011

7.0

2015

6.9

2016

6.9

2017

7.5

1994

7.6

2013

6.6

1993

7.3

2006

7.4

1984

7.8