減Chronology

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58067070085010001080110016101680170018001900 590–669710–849860–9991010–10791160–16091620–1679

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1

2

1

1

1

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1

1

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3

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1

13 +7

36 +30

1

5

13 +7

13 +7

3

3

5

3

4

2

No year recorded 63

+57

Each crop stands at the decade of the first year its book's date gives; a date given only as before a year stands at that year. Dates come from the catalogues and editions cited with each record. The bars draw the whole span and their counts to scale; in the strip below them, fifty years or more with no crop are folded and marked. Japanese dates converted with HuTime ↗