1999

6.3

1965

7.2

2008

7.0

1990

5.9

2000

5.2

2008

6.7

1965

6.9

2004

6.5

2009

4.7

1998

6.1

1963

6.6

1940

7.1

1985

6.7

2009

4.5

1929

7.8

2020

6.8

1999

5.9

1982

7.7

2016

7.8

1987

5.5