1990

6.9

1979

7.4

1984

8.4

2004

9.5

2000

6.6

2009

7.3

1996

8.0

2014

7.9

1992

8.2

1994

8.3

2018

6.6

2015

8.1

2020

8.5

1998

6.8

2010

7.4

2020

6.8

2012

8.1

2019

6.8

2009

7.5

2023

6.9