1987

6.5

2007

7.8

2019

8.1

2023

7.7

2007

7.3

2000

8.2

2018

6.8

2011

8.3

2012

7.8

2020

7.7

2016

7.9

1990

7.7

2014

8.5

2000

6.4

1996

7.4

2019

7.8

1991

7.1

2014

7.5

1990

7.5

2009

7.0