1944

4.9

1968

5.8

1964

7.3

1933

5.0

1987

5.8

2007

5.5

1970

7.2

2006

5.4

1987

6.8

2014

5.4

2014

5.6

2016

4.4

1983

6.2

2009

4.9

1974

6.9

1958

7.1

2009

6.6

1990

6.7

0.0

2007

6.6