1999

6.8

2019

7.0

2007

6.7

2011

7.1

2014

6.9

1969

8.3

2014

6.3

2017

6.5

2003

8.7

2013

7.6

2009

5.9

2005

6.8

2009

7.7

2002

6.6

1998

6.1

2016

6.6

1998

6.4

2006

6.7

2020

6.5

2019

8.7