1937

5.5

2014

7.7

1994

9.0

2011

6.9

1989

7.9

1961

8.4

1955

7.2

1990

6.5

1976

7.5

2010

6.6

2001

5.2

1972

6.3

1924

8.1

1929

6.5

2003

7.1

1965

7.4

2014

7.2

1956

7.1

2009

7.1

2016

6.6