2015

6.5

2021

6.2

1993

5.5

2016

6.2

2011

5.6

2019

8.0

1997

6.4

1974

5.6

1969

6.1

2013

3.5

7.0

2006

7.0

2014

5.0

1987

4.2

2017

7.5

2009

8.5

1911

4.5

2003

4.8

2012

6.0