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1-year delta. https://qagg.news/?q=%7BDR%2003%2F24%2F2020-03%2F28%2F2020%7D&delta=1
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2-year delta. https://qagg.news/?q=%7BDR%2003%2F24%2F2019-03%2F28%2F2019%7D&delta=2
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3-year delta. https://qagg.news/?q=%7BDR%2003%2F24%2F2018-03%2F28%2F2018%7D&delta=3
Has the delta thing really panned out though? Seems like more datefagging to me.