1955

7.4

1961

5.6

2006

6.5

2008

6.4

2017

6.0

1931

4.0

2021

7.8

2016

7.0

1978

0.0

2011

5.7

2010

0.0

1990

0.0

1952

7.2

2012

0.0

2004

7.1

2000

6.1

1976

4.9

1958

8.7

1961

8.0

1968

6.0