2005

4.2

1984

6.9

2016

4.0

1994

5.5

2007

6.0

2012

5.4

1997

4.1

1994

7.0

1982

3.7

1971

6.2

1992

0.0

1983

3.0

1982

5.2

1989

0.0

1995

5.7

2015

5.0