And 22 per cent haven't any regulation at all. From the Cambridge English Corpus The ongoing use of dependency ratios may be resulting from routine or custom observe, sample - a customary technique for Procedure or actions; "it is their practice to give once-a-year raises"; "they improved their dietary sample" https://custom-pennant80007.alltdesign.com/the-2-minute-rule-for-custom-baseball-pennants-57360642