1963

5.9

2020

6.3

2002

8.6

2007

9.8

1956

6.4

1991

7.0

2017

5.9

2009

5.4

1957

7.2

1985

6.8

1983

7.4

1990

6.1

2015

6.3

1898

6.9

2012

7.6

2006

6.7

2003

6.6

1970

6.2

1982

6.6

2015

6.5