1984

6.9

2013

6.2

2000

6.2

2007

8.0

2005

5.1

1982

6.4

1980

4.0

1997

0.0

1982

6.8

1998

6.0

1979

6.8

1951

7.6

2009

0.0

1988

0.0

2016

6.2