2006

6.7

2013

6.4

2016

6.1

2004

6.6

2013

6.2

2009

6.7

1993

6.1

1981

6.4

1982

6.7

2013

7.5

2014

6.7

1999

5.9

2000

5.1

1949

6.2

2006

6.8

2020

7.3

2015

6.5

1977

6.6

2017

6.5

2013

6.6