1952

7.4

2003

4.9

1959

8.0

1975

7.8

1985

6.7

1988

6.3

1952

7.9

2004

6.2

2014

5.9

2009

4.8

1952

7.8

1990

5.9

2010

6.7

2000

6.4

1903

7.0

2011

6.9

2012

5.0

1989

5.5

1958

7.6

1975

7.5