Volatility is your friend;Victorian average grain yields and standard deviation

Decade

Standard deviation

Average yield

1908-17

0.3

1.15

1918-27

0.17

1.24

1928-37

0.09

1.14

1938-47

0.35

0.79

1948-57

0.09

1.15

1958-67

0.37

1.14

1968-77

0.28

1.16

1978-87

0.45

1.31

1988-97

0.4

1.76

1998-07

0.72

1.73

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