1999

7.4

1983

7.2

2009

5.8

1990

7.8

2019

8.5

2014

8.6

1998

6.8

2010

8.1

2015

8.7

2017

8.4

2006

8.3

1966

8.0

2004

6.9

2011

6.7

2013

6.9

2021

7.1

2005

6.1

2020

8.6

2024

7.2

2009

8.2