2002

6.3

1988

5.1

2001

6.8

1962

7.7

2003

7.2

1997

6.7

2015

10.0

1995

7.0

1985

7.0

2002

2.0

2013

7.0

2011

6.5

1976

0.0

2016

4.9

2016

0.0

2016

0.0

2018

5.6

2010

5.9

2009

7.8

2017

6.7