1972

4.0

2002

5.0

2012

9.7

2005

9.9

1989

5.9

1991

7.0

2001

4.3

2011

9.5

2012

7.7

2007

5.7

2009

7.5

6.3

6.4

2021

6.2

2015

6.4

2014

6.6

2011

6.3

2008

8.3

2012

6.2

2012

7.7