2006

5.9

2015

7.5

2017

6.0

2009

5.2

1978

3.7

2001

6.8

1991

6.5

2001

7.9

2003

5.1

2011

6.9

1980

6.9

1993

7.1

2020

6.7

1992

6.4

2002

6.0

2004

6.7

2002

6.2

2013

7.3

2002

6.3

2003

8.5