1992

3.3

2001

5.8

1983

6.6

2008

5.1

1969

4.6

2014

6.8

2005

0.0

1976

6.6

2001

7.6

1984

2.0

1981

7.1

2017

6.0

2011

0.0

2008

5.6

2001

6.6

2005

5.6

1990

7.3

2003

4.8

2000

6.4

2013

4.3