1944

6.6

1947

7.1

2010

6.4

2011

5.9

2016

7.5

1978

5.4

1989

7.2

1926

7.9

2015

6.5

2005

4.9

1960

7.8

1995

2.7

0.0

2008

6.2

2006

4.6

1953

6.0

1947

6.0

1949

6.6

1961

6.6

2008

6.5