What's going up, what's going down

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DECLARE @AnnualPosts TABLE
(
  y int,
  numPosts int
)

INSERT INTO @AnnualPosts (y, numPosts)

  select year(CreationDate), count(id)
  from Posts
  where answerCount + CommentCount > 0
  group by year(CreationDate)

DECLARE @TopTags TABLE
(
  tagId int,
  tagName varChar(32),
  usage_12 int, 
  usage_13 int, 
  usage_14 int, 
  usage_15 int, 
  usage_16 int, 
  tagDescription nVarChar(max)
  
)

INSERT INTO @TopTags (tagID, tagName, usage_12, usage_13, usage_14, usage_15, usage_16, tagDescription)

  select top 1000 t.id tagId, t.tagName,  
  sum (case when year(p.creationDate) = 2012 then 1 else 0 end) TagUsage2012, 
  sum (case when year(p.creationDate) = 2013 then 1 else 0 end) TagUsage2013,   
  sum (case when year(p.creationDate) = 2014 then 1 else 0 end) TagUsage2014,   
  sum (case when year(p.creationDate) = 2015 then 1 else 0 end) TagUsage2015, 
  sum (case when year(p.creationDate) = 2016 then 1 else 0 end) TagUsage2016, 
  excerptPost.body
  from tags t
  join PostTags pTags on pTags.tagId = t.id
  join Posts p on pTags.postId = p.id
  join Posts excerptPost on excerptPost.id = t.excerptPostId
  where year(p.creationDate) in (2012, 2013, 2014, 2015, 2016)
  group by t.Id, t.tagName, excerptPost.body
  order by TagUsage2016 desc 

select * from @topTags

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