1986

6.2

1953

7.2

2010

7.4

2009

6.8

1996

5.8

2006

6.8

1980

5.9

1965

6.4

1988

5.7

1975

6.3

2001

6.9

1974

6.6

1971

6.0

2013

6.5

1933

6.2

2023

9.2

1976

6.2

2017

6.6

1994

6.1

1999

5.1