1997

7.1

1981

7.5

2018

6.3

2015

6.5

2012

5.3

2002

5.7

1980

0.0

2003

0.0

2011

0.0

1991

0.0

1977

4.7

2015

0.0

2002

7.0

2011

0.0

2019

6.9

2017

5.0

1978

6.0

1994

6.0

2009

0.0

2019

7.5