1992

6.8

1990

6.9

2021

8.2

2007

8.5

2008

8.9

2002

8.3

2009

8.5

2018

7.4

1997

7.3

1999

7.9

2019

8.4

1999

8.3

2001

7.6

2016

7.3

2023

7.4

1976

7.9

2014

7.7

2015

7.5

2020

7.5

2005

8.2