1961

6.9

1953

7.3

2017

5.9

2000

6.3

1990

5.7

1957

6.6

1989

5.9

1956

6.4

1984

6.0

2012

5.8

1968

6.2

1983

6.8

2014

6.5

2009

5.0

2012

6.0

2009

6.7

2021

7.1

1898

6.1

1958

7.4

1997

6.0