1964

7.0

2007

5.4

1975

4.5

2021

6.2

2011

6.2

2019

7.7

2015

5.1

2014

5.9

2008

5.6

2017

6.4

2013

5.8

1993

5.4

2006

6.3

2013

6.1

2014

6.4

2007

6.3

2014

6.8

1996

9.5

2003

7.1

2010

6.8