2017

6.7

2002

6.3

1992

4.9

2004

3.8

1998

5.8

1977

4.1

2008

6.8

1989

6.0

1991

5.6

2011

5.0

2015

4.6

2009

6.0

1928

9.0

1984

0.0

1992

0.0

1992

0.0

1996

5.0

2012

2.0

1981

1.0

2004

0.0