2001

6.5

2003

6.7

2003

6.4

2005

6.1

2017

6.9

2015

2.7

2015

6.6

2009

6.4

2013

5.4

1971

6.6

1988

6.3

1962

6.2

2016

6.4

1973

0.0

2006

7.0

2006

5.8

2009

6.7

2002

5.4

1968

6.0

2002

6.2