2001

7.1

2015

6.8

2016

8.2

2019

7.1

2005

8.1

1994

8.7

1980

8.2

2016

8.2

2013

8.0

2012

7.7

1996

7.9

2009

7.4

2007

7.1

2017

7.6

2009

7.6

1998

7.8

1999

7.3

2019

7.4

2012

7.3

2015

7.5