1995

2.9

2012

7.6

1994

7.2

2014

7.6

1990

7.4

2001

7.6

2021

7.9

2016

6.9

2018

8.4

2011

8.1

2010

6.5

2023

5.0

2013

7.8

2013

7.6

1999

7.9

2019

5.8