1993

7.7

2011

8.5

2014

7.8

2008

8.9

1994

8.4

2019

8.4

1989

8.0

2016

8.6

2021

8.8

2007

8.5

2015

7.3

2019

8.7

2019

8.5

2010

8.1

2016

8.4

1999

7.9

2009

8.3

2017

8.5

2004

7.9

2012

6.8