2013

5.5

2017

7.3

2015

6.2

2008

6.8

1996

7.5

2002

6.1

1969

7.0

1996

4.4

2012

5.5

1993

6.5

2015

6.9

2014

4.9

1966

6.7

1971

6.5

2016

5.9

1987

5.2

2004

9.9

2008

5.8

1987

7.4

1999

4.5