1969

5.8

1967

6.5

1965

6.8

1996

6.6

1998

7.7

1979

7.3

2012

6.5

2011

4.9

2005

9.4

1948

7.1

2014

7.1

2000

6.9

2021

6.3

1978

10.0

1914

5.7

2009

4.5

2013

7.0

1971

6.9

1970

7.6

1991

5.9