2012

5.8

2017

6.1

1990

6.3

2001

9.0

2007

5.0

2019

7.7

1968

6.9

2009

4.8

2012

6.2

2015

6.4

1998

5.1

2010

6.6

1985

7.1

2011

5.6

1995

6.3

1990

6.5

1996

5.5

2012

5.9

2015

8.1

2021

7.2