1989

6.5

2016

6.0

1996

5.8

2008

5.5

2020

9.4

2013

6.1

1970

4.6

1986

5.5

2015

8.1

0.0

2010

6.5

1999

5.9

1988

7.6

2017

6.0

2001

5.8

2016

6.9

1977

6.8

2021

7.0

2020

5.8

2012

5.8