2003

6.2

2009

6.1

2002

6.0

2000

7.2

1953

6.6

1988

6.5

2012

5.7

1987

7.5

2002

6.4

1992

6.2

2013

7.7

1990

6.1

2011

5.8

2003

8.8

2013

6.1

2004

6.0

1952

8.3

2008

6.3

2009

4.1

1963

6.9