1949

7.7

1895

6.8

2002

6.6

2008

7.2

2011

6.9

1967

6.6

2003

6.3

2007

6.4

1997

7.6

1990

5.5

1952

6.7

2007

7.3

2004

7.2

1964

7.3

2009

6.1

1999

6.2

1992

5.3

2000

6.6

2007

6.0