1952

5.8

1970

6.9

1951

6.3

2009

5.4

1982

4.0

2017

7.0

1935

6.6

1997

6.2

1984

5.6

2016

6.7

2005

6.5

2001

5.9

1988

4.5

2022

6.9

1969

7.0

2002

6.4

2003

6.8

2000

6.4

2006

5.3

1974

6.1