2020

6.7

2013

6.1

2013

6.6

2011

7.1

2009

6.3

2021

6.6

2015

6.1

2000

7.3

2009

5.1

1993

5.5

1964

7.4

2010

6.2

1999

5.6

2004

4.9

2007

6.4

2014

6.5

2017

8.1

2001

6.2

1921

7.7

2001

4.3