2010

4.4

2015

6.2

2021

9.2

2005

6.4

2016

5.9

2003

6.0

2003

5.7

1998

6.4

2018

7.5

1968

7.3

2008

7.4

2015

7.0

1992

6.2

2004

6.6

1999

7.9

2011

6.1

2019

7.3

2015

6.2

2002

7.5

1999

6.0