| Prearranged signs |
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The following prearranged signs are used in the published tables: |
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Dash ( - ) |
a) when the observed phenomenon does not exist; |
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b) when the phenomenon exists and was registered, but there were no occurrences. |
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Two little dots ( .. ) |
in place of numbers smaller than half the minimum order digit. |
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| Per cent compositions |
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Per cent compositions are automatically rounded to the first decimal place. Hence, the total per cent value could be different from 100. |
