2017

8.1

2003

6.8

2019

6.5

2022

5.1

1991

5.6

1968

6.9

1976

6.2

1985

6.1

2012

5.3

2008

5.8

1975

6.4

2021

6.1

1986

6.2

2019

6.1

2015

6.6

1999

6.6

2001

6.8

2022

6.0

2020

6.4

2016

5.7