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We examined over 15,000 metadata records from 26 collections extracted from the Common Metadata Repository (CMR) during April 20162017. The links below connect to tables in google sheets which provide the average number of occurrences of UMM-Collection elements in each of these collections. A value of 1 or more typically (although not necessarily) indicates that the element is included one or more times in each record in a collection.  A value < 1.0 is typically the percentage of records in a collection that include the metadata element. Cells with pink backgrounds indicate values of 0, meaning the element is completely missing from the collection.

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