2000

7.7

1928

8.0

1966

6.3

2006

5.6

2010

7.7

2020

6.0

1989

6.3

1920

7.9

1998

8.1

2010

6.1

2013

6.7

1968

6.9

1996

7.4

2012

6.5

1984

7.9

1965

7.4

1967

7.5

1997

6.2

1990

5.3

2008

6.5