1983

6.7

2003

6.0

2018

5.0

1984

7.1

2016

5.9

1987

5.4

2014

6.9

2015

7.2

2017

6.0

2015

5.7

1970

6.3

1973

9.2

2022

3.8

2010

5.5

1989

6.0

2014

5.6

1999

5.2

1931

5.8

2011

7.2

2013

5.6