2009

6.9

1986

5.3

2015

6.6

1993

6.9

2007

6.2

2007

5.5

2006

6.0

2016

2.6

1999

5.7

1998

6.7

2014

5.8

2011

6.8

2012

6.1

1977

4.9

1995

4.3

2011

6.4

1985

5.7

1952

6.7

2017

6.4

1999

6.0