1964

6.2

1965

6.1

2007

3.1

2003

3.9

1966

6.2

2008

5.2

1973

5.0

1935

4.5

1936

5.0

1917

5.5

1952

6.6

1991

6.1

1945

3.5

1943

5.5

2009

2.0

2016

4.4

2017

6.1

2016

6.2

1990

5.0

1956

7.6