2005

7.8

2013

6.4

1992

6.2

2011

7.5

2017

7.3

1999

7.6

2003

4.1

2004

7.1

2012

9.7

1985

5.1

2002

5.4

2008

5.2

2021

6.8

1970

6.4

1970

6.9

2001

5.2

2004

7.4

2005

5.1

2007

5.7

2017

5.9