1994

6.9

2020

7.7

2010

7.6

2025

8.0

1989

7.5

2012

8.4

1980

8.2

2019

8.5

2019

7.5

2005

7.0

1990

7.4

2018

5.1

2003

7.8

2016

7.1

1969

7.1

2021

7.2

1976

6.7

2019

7.1

2008

6.7

2014

7.3