1932

6.9

2000

6.5

1989

7.8

2006

6.8

2002

7.2

1968

7.3

1970

7.1

2018

10.0

2017

3.9

2015

0.0

2014

5.4

1984

5.7

2006

7.3

2011

0.0

1963

7.7

1939

6.4

1990

6.1

2009

7.3

1957

6.1

2002

6.5