2017

6.1

2015

6.0

2014

5.8

2001

7.2

2008

4.5

2004

7.1

2009

6.2

2010

6.6

1987

5.3

2023

4.1

1967

6.7

2010

6.3

2022

7.3

2006

6.4

2020

7.0

1967

6.5

1953

6.9

2021

9.2

1974

6.3

1973

7.3