2014

6.0

2010

6.6

2011

7.1

2012

6.3

1968

6.9

1952

7.9

1954

7.2

7.8

2015

6.1

2007

6.7

2014

6.8

1950

7.6

1977

8.0

1923

6.7

1924

7.3

2018

7.0

1964

7.2

1984

7.1

1994

6.4

1983

7.0