2000

7.2

2004

5.8

2011

7.5

2008

7.0

2012

6.6

1994

7.9

1952

7.7

1989

5.1

1994

6.5

2004

6.4

2002

6.4

1931

6.9

1949

7.7

2010

9.1

1991

8.3

2003

6.2

1966

8.5

1970

6.3

1955

7.2

1972

4.0