1976

6.9

1988

2.5

1996

5.6

1983

7.1

1958

6.2

1961

5.0

1992

6.0

2010

5.4

1981

5.5

1984

2.0

1925

5.7

1931

5.0

2006

4.5

1982

2.8

1927

4.4

1927

3.5

1954

4.1

1995

5.0

2017

0.0

1946

5.9