1927

0.0

1981

6.5

1984

7.2

2005

7.1

2018

6.1

1998

5.6

1951

6.0

1985

7.8

1997

4.9

1994

0.0

2014

5.0

1996

4.0

2008

5.5

2002

6.4

1941

6.7

2009

5.8

2019

0.0

1913

0.0

2015

6.9

1963

7.2