2015

7.4

2010

7.1

7.8

6.1

2006

6.4

1961

8.0

2020

7.3

2021

7.7

1999

8.4

1993

6.1

2019

6.0

2023

6.5

2017

6.1

2017

7.2

2018

6.0

1962

7.6

1952

6.0

2018

7.8

1973

7.1

2014

4.8