2000

6.4

2013

7.7

1990

6.6

2001

6.3

2004

6.1

2011

6.4

2002

5.4

1967

7.3

2002

6.1

1959

6.9

2007

6.5

1998

6.0

2008

8.9

1947

6.3

2009

5.6

1941

7.0

2006

6.2

2016

6.1

2016

6.7

2002

7.6