1996

7.0

1995

7.2

1967

5.3

2001

6.8

2007

0.0

1993

5.5

2013

3.4

1989

7.0

1999

0.0

2013

7.5

2010

8.0

1976

7.1

1966

7.0

1981

8.0

2002

5.9

1991

7.5

2014

8.3

2015

4.5

2011

6.7

2008

4.0