2013

4.1

1923

7.5

1966

7.7

1968

6.4

1989

7.5

1976

7.5

2017

8.0

2008

5.8

1930

7.3

2004

6.1

2014

5.6

2006

7.8

1990

5.2

1960

8.0

1963

6.8

1994

6.4

2005

6.2

1958

6.6

1955

7.2

2017

5.5