1985

6.1

2009

7.7

2007

6.5

2011

6.7

1994

6.4

2016

0.0

2019

6.5

2006

7.0

2021

5.3

2013

9.0

1951

5.3

1957

7.4

2002

5.9

2016

6.3

1977

5.6

1919

6.0

1997

7.6

2018

0.0

1967

7.7

1999

1.0