1969

7.6

2012

5.7

2004

7.3

2011

6.1

2019

8.2

1977

6.3

2018

8.3

2012

5.4

2004

7.3

2009

7.7

2009

7.3

1999

6.4

2008

6.9

2014

6.7

2010

7.7

2000

5.2

2016

7.1

1993

7.2

2019

6.9