1981

8.0

1996

7.8

2023

8.0

2021

7.4

2001

0.0

2020

0.0

1992

6.2

1997

2.6

2014

7.5

2015

7.0

1990

4.3

2017

7.2

2018

7.9

2012

7.4

2013

7.5

2002

7.3

2008

7.7

2001

7.0

2003

8.0

2000

8.1