2012

6.4

2006

6.7

1994

7.5

1989

5.4

2010

7.4

1998

5.2

1991

7.0

2009

7.4

2014

7.7

2011

6.3

2017

6.8

2002

4.6

1989

5.1

2017

7.6

2016

5.7

1931

7.2

2012

7.8

2012

7.8

2002

6.3

2018

6.7