1993

5.5

2017

6.8

2009

4.8

2003

5.8

2006

6.4

2012

6.7

2012

6.0

1970

4.6

2021

10.0

1966

7.1

1963

7.6

2011

7.3

2021

9.2

1975

7.9

2009

5.1

1996

7.6

2004

6.5

1986

7.6

2013

5.9

2010

7.0