1974

6.3

1991

7.0

2011

6.9

2004

6.7

2014

6.8

2005

6.4

1986

6.0

2005

5.2

1990

7.5

1895

5.5

1982

5.7

2006

6.7

2010

6.4

2019

7.4

2016

5.3

2013

7.1

1997

5.9

2012

4.3

2010

5.5

2014

5.8