1972

4.2

1925

7.6

1995

7.3

1951

7.6

1974

7.0

1982

6.3

1999

4.7

2011

7.7

2008

6.6

2007

7.3

2010

0.0

2003

5.4

1985

6.6

2002

6.3

2003

6.9

2009

7.1

2005

7.7

2006

7.4

1969

6.8

1974

7.9