[metrics-bugs] #21419 [Metrics/Metrics website]: avoid spurious downturns and 'spamming' of top-10-censorship list

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#21419: avoid spurious downturns and 'spamming' of top-10-censorship list
-----------------------------------------+--------------------------
     Reporter:  iwakeh                   |      Owner:  metrics-team
         Type:  defect                   |     Status:  new
     Priority:  Medium                   |  Milestone:
    Component:  Metrics/Metrics website  |    Version:
     Severity:  Normal                   |   Keywords:
Actual Points:                           |  Parent ID:
       Points:                           |   Reviewer:
      Sponsor:                           |
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 [https://metrics.torproject.org/userstats-censorship-
 events.html?start=2016-01-01&end=2016-12-31 top 10 list for 2016]
 [[Image(top10censorship-2016-marked.png)]]
 The marked countries have a very low client count and the predicted lower
 value is zero.
 Similarly, the downturns in country specific censorship events, for
 example [https://metrics.torproject.org/userstats-relay-
 country.html?start=2016-01-01&end=2016-12-31&country=an&events=on
 Netherlands Antilles in 2016] [[Image(userstats-relay-country-
 an-2016-01-01-2016-12-31-on.png)]]

 I attache a simple path.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21419>
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