2003

6.2

2023

6.4

2015

6.5

2013

6.1

1989

5.8

6.6

1988

5.5

1990

4.4

2020

6.3

2011

6.7

1955

6.3

1985

6.9

2017

5.6

1998

6.0

2010

6.1

1991

5.7

2018

6.5

2011

6.9

1989

6.2

2006

6.8