2001

7.8

2002

7.4

1986

6.6

1974

6.7

1991

7.4

2004

5.2

2011

3.8

2014

0.0

1998

6.2

2003

6.0

2007

6.1

2000

6.4

2006

6.0

2013

1.7

2003

6.6

1972

7.4

2013

6.2

1998

6.9

2002

6.2

1997

6.8