1933

6.6

1969

6.4

2014

7.4

1983

7.6

1995

6.5

1892

4.7

1892

3.7

1980

6.3

2005

6.8

1970

6.2

2013

7.3

2013

6.9

1960

5.2

2008

6.5

2014

4.8

2014

6.0

2013

6.2

2013

6.0

2013

7.5

1959

5.4