1987

7.3

2009

7.2

2013

6.8

2019

7.3

1993

5.6

2006

6.9

2012

8.7

2021

6.4

2016

6.6

2012

8.4

2002

8.6

2015

9.0

2020

5.5

2006

6.2

2014

7.5

2011

7.1

1991

7.7

1990

7.6

2016

6.2

2005

8.1