2020

6.5

1989

6.1

1996

6.7

2000

6.8

1981

6.5

2013

5.0

2014

6.7

1981

7.0

1999

4.8

2015

6.3

2017

6.9

2004

5.9

1972

7.2

1989

6.6

1986

6.0

2002

6.1

2008

7.1

2022

0.0

2007

5.5

2018

6.0